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A056769 Puzzle 2, related to polyominoes. 0
1, 9, 64, 601, 5616 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

From Vicher's table.

LINKS

Table of n, a(n) for n=0..4.

M. Keller, Counting Polyforms

M. Vicher, Polyforms

CROSSREFS

Sequence in context: A037540 A037484 A013566 * A273232 A064546 A217872

Adjacent sequences:  A056766 A056767 A056768 * A056770 A056771 A056772

KEYWORD

nonn

AUTHOR

James A. Sellers, Aug 28 2000

EXTENSIONS

Edited by T. D. Noe, Apr 09 2009

STATUS

approved

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Last modified January 19 21:52 EST 2019. Contains 319310 sequences. (Running on oeis4.)