login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A056769
Puzzle 2, related to polyominoes.
0
1, 9, 64, 601, 5616
OFFSET
0,2
COMMENTS
From Vicher's table.
CROSSREFS
Sequence in context: A037484 A378566 A013566 * A273232 A064546 A351591
KEYWORD
nonn
AUTHOR
James A. Sellers, Aug 28 2000
EXTENSIONS
Edited by T. D. Noe, Apr 09 2009
STATUS
approved