A103464 - OEIS

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A103464

Number of polyominoes consisting of n regular unit heptagons.

0

1, 1, 2, 7, 25, 118, 558, 2876, 14982, 80075, 431889, 2354991, 12930257, 71459124, 396978189, 2215609864

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OFFSET

3,3

LINKS

Table of n, a(n) for n=3..18.

Matthias Koch and Sascha Kurz, Enumeration of generalized polyominoes, arXiv:math/0605144 [math.CO], 2006.

CROSSREFS

Cf. A000577, A000104, A000228, A103466, A103467, A103468, A103469, A103470, A103471, A103472, A103473, A120102, A120103, A120104.

Sequence in context: A076176 A188719 A103465 * A383388 A358498 A339515

Adjacent sequences: A103461 A103462 A103463 * A103465 A103466 A103467

KEYWORD

nonn,more

AUTHOR

Sascha Kurz, Jun 09 2006

STATUS

approved