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A151514 Number of 1-sided strip polyominoes with n cells. 4
1, 1, 2, 5, 10, 24, 53, 126, 289, 686, 1604, 3792, 8925, 21051, 49638, 116858, 275480, 647573, 1525113, 3580673, 8423334, 19755938, 46422915 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..23.

Ed Pegg, Jr., Illustrations of polyforms

Eric Weisstein's World of Mathematics, Polyomino

CROSSREFS

Sequence in context: A032170 A084081 A106376 * A321007 A253013 A192471

Adjacent sequences:  A151511 A151512 A151513 * A151515 A151516 A151517

KEYWORD

nonn,hard,more

AUTHOR

Ed Pegg Jr, May 13 2009

EXTENSIONS

a(15)-a(23) from Joseph Myers, Nov 22 2010

STATUS

approved

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Last modified August 20 07:48 EDT 2019. Contains 326143 sequences. (Running on oeis4.)