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A056769
Puzzle 2, related to polyominoes.
0
1, 9, 64, 601, 5616
OFFSET
0,2
COMMENTS
From Vicher's table.
CROSSREFS
Sequence in context: A037540 A037484 A013566 * A273232 A064546 A351591
KEYWORD
nonn
AUTHOR
James A. Sellers, Aug 28 2000
EXTENSIONS
Edited by T. D. Noe, Apr 09 2009
STATUS
approved