Add "Recamán" hole

JRaspass · JRaspass · commit 1ef979ec11c2 · 2020-12-26T21:13:30.000Z
Closes #348
diff --git a/db/a-schema.sql b/db/a-schema.sql
@@ -9,7 +9,7 @@ CREATE TYPE hole AS ENUM (
     'levenshtein-distance', 'leyland-numbers', 'look-and-say',
     'lucky-tickets', 'morse-decoder', 'morse-encoder', 'niven-numbers',
     'odious-numbers', 'ordinal-numbers', 'pangram-grep', 'pascals-triangle',
-    'pernicious-numbers', 'poker', 'prime-numbers', 'quine',
+    'pernicious-numbers', 'poker', 'prime-numbers', 'quine', 'recamán',
     'rock-paper-scissors-spock-lizard', 'roman-to-arabic', 'rule-110',
     'seven-segment', 'sierpiński-triangle', 'spelling-numbers', 'sudoku',
     'ten-pin-bowling', 'tongue-twisters', 'united-states', 'vampire-numbers',
diff --git a/holes.toml b/holes.toml
@@ -1344,17 +1344,19 @@ preamble = '''
 
 ['Recamán']
 category = 'Sequence'
-experiment = 348
 links = [
-    { name = 'Numberphile', url = '//numberphile.com/videos/slightly-spooky-recaman-sequence' },
-    { name = 'Wikipedia',    url = '//en.wikipedia.org/wiki/Recamán%27s_sequence' },
+    { name = 'Numberphile',  url = '//numberphile.com/videos/slightly-spooky-recaman-sequence' },
     { name = 'OEIS A005132', url = '//oeis.org/A005132'},
+    { name = 'Rosetta Code', url = "//rosettacode.org/wiki/Recaman's_sequence" },
+    { name = 'Wikipedia',    url = "//www.wikipedia.org/wiki/Recamán's_sequence" },
 ]
 preamble = '''
 <p>
-    Starting from zero, each term of the sequence is <b>a(n) = a(n-1) - n</b> but only if <b>a(n) > 0</b>
-     and it has not previously generated. In case the condition doesn't hold, <b>a(n) = a(n-1) + n</b>.
-     Print the first 250 terms of the sequence one per line.
+    Starting from zero, each term of the sequence is <b>a(n) = a(n-1) - n</b>
+    but only if <b>a(n) > 0</b> and it has not previously generated. In case
+    the condition doesn't hold, <b>a(n) = a(n-1) + n</b>.
+
+<p>Print the first <b>250</b> terms of the sequence one per line.
 '''
 
 
