Add the "Leyland Numbers" hole

JRaspass · JRaspass · commit 90b0cc82d2d4 · 2020-07-26T02:05:14.000+01:00
diff --git a/db/a-schema.sql b/db/a-schema.sql
@@ -5,9 +5,9 @@ CREATE TYPE hole AS ENUM (
     '12-days-of-christmas', '99-bottles-of-beer', 'abundant-numbers',
     'arabic-to-roman', 'brainfuck', 'christmas-trees', 'css-colors', 'cubes',
     'diamonds', 'divisors', 'emirp-numbers', 'evil-numbers', 'fibonacci',
-    'fizz-buzz', 'happy-numbers', 'leap-years', 'lucky-tickets',
-    'morse-decoder', 'morse-encoder', 'niven-numbers', 'odious-numbers',
-    'ordinal-numbers', 'pangram-grep', 'pascals-triangle',
+    'fizz-buzz', 'happy-numbers', 'leap-years', 'leyland-numbers',
+    'lucky-tickets', 'morse-decoder', 'morse-encoder', 'niven-numbers',
+    'odious-numbers', 'ordinal-numbers', 'pangram-grep', 'pascals-triangle',
     'pernicious-numbers', 'poker', 'prime-numbers', 'quine',
     'rock-paper-scissors-spock-lizard', 'roman-to-arabic', 'rule-110',
     'seven-segment', 'sierpiński-triangle', 'spelling-numbers', 'sudoku',
diff --git a/hole/answers.go b/hole/answers.go
@@ -1184,6 +1184,113 @@ Buzz`,
 2392
 2396
 2400`,
+	"leyland-numbers": `8
+17
+32
+54
+57
+100
+145
+177
+320
+368
+512
+593
+945
+1124
+1649
+2169
+2530
+4240
+5392
+6250
+7073
+8361
+16580
+18785
+20412
+23401
+32993
+60049
+65792
+69632
+93312
+94932
+131361
+178478
+262468
+268705
+397585
+423393
+524649
+533169
+1048976
+1058576
+1596520
+1647086
+1941760
+2012174
+2097593
+4194788
+4208945
+4785713
+7861953
+8389137
+9865625
+10609137
+14352282
+16777792
+16797952
+33554432
+33555057
+43050817
+45136576
+48989176
+61466176
+67109540
+67137425
+129145076
+134218457
+177264449
+244389457
+268436240
+268473872
+292475249
+364568617
+387426321
+536871753
+774840978
+1073742724
+1073792449
+1162268326
+1173741824
+1221074418
+1996813914
+2147484609
+2179768320
+3486792401
+4294968320
+4295032832
+4486784401
+6104053449
+8589935681
+8804293473
+10460362464
+13065520825
+13877119009
+17179870340
+17179952705
+20000000000
+30518337500
+31381070257
+33739007300
+34359739593
+68719478032
+68719581712
+69149458432
+78371693632
+94143190994
+96951758924`,
 	"niven-numbers": `1
 2
 3
diff --git a/holes.toml b/holes.toml
@@ -735,6 +735,26 @@ preamble = '''
     to and including <b>2400</b>.
 '''
 
+['Leyland Numbers']
+category = 'Sequence'
+links = [
+    { name = 'OEIS A076980', url = '//oeis.org/A076980' },
+    { name = 'Wikipedia',    url = '//www.wikipedia.org/wiki/Leyland_number' },
+]
+preamble = '''
+<p>
+    A leyland number is of the form <b>x<sup>y</sup> + y<sup>x</sup></b> where
+    <b>1 < y ≤ x</b>.
+
+<p>
+    For example, <b>8</b> is a leyland number because
+    <b>2<sup>2</sup> + 2<sup>2</sup> = 8</b>.
+
+<p>
+    Print all the leyland numbers from <b>1</b> to <b>100,000,000,000</b>
+    inclusive, each on their own line.
+'''
+
 ['Lucky Tickets']
 category = 'Mathematics'
 preamble = '''
