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A304179 Number of "forceless" (or "useless") sequences in n-column Nonogram puzzle. 0
0, 1, 1, 3, 3, 7, 8, 15, 20, 33, 47, 75, 110, 172, 259, 401, 612, 947, 1457, 2258, 3494, 5428, 8434, 13138, 20480, 31982, 49991, 78244, 122583, 192255, 301797, 474190, 745667, 1173510, 1848204, 2912884, 4593955, 7249843, 11448105, 18087986, 28594742, 45228384, 71573873, 113320180, 179498299, 284449744 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
Ryan Mullen, On Determining Paint by Numbers Puzzles with Nonunique Solutions, J. Integer Sequences 12 (2009), Article 09.6.5.
Daniel Berend and Shira Zucker, The Asymptotics of Useless Hint Sequences in Nonograms, J. Integer Sequences 21 (2018), Article 18.4.2.
CROSSREFS
Sequence in context: A110618 A320291 A320294 * A182559 A108046 A286110
KEYWORD
nonn
AUTHOR
Jeffrey Shallit, May 07 2018
STATUS
approved

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Last modified March 28 08:00 EDT 2024. Contains 371235 sequences. (Running on oeis4.)