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A130866 Number of polyominoes (or square animals) with at most n cells. +0
2
1, 2, 4, 9, 21, 56, 164, 533, 1818, 6473, 23546, 87146, 325737, 1227708, 4654284, 17733539, 67841448, 260463500, 1003087732, 3873759682, 14996820360, 58188678048, 226235685776, 881235386179, 3438462430943, 13437551253018 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Partial sums of A000105.

Sequence in context: A001430 A057513 A006080 this_sequence A123458 A048194 A058718

Adjacent sequences: A130863 A130864 A130865 this_sequence A130867 A130868 A130869

KEYWORD

nonn

AUTHOR

Tanya Khovanova (tanyakh(AT)yahoo.com), Jul 23 2007

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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