A216821 Number of standardized 4-connected side polyominoes of inner site-perimeter n.

0, 1, 1, 5, 13, 54, 182, 782, 3080, 13250

Offset

2,4

Links

Table of n, a(n) for n=2..11.

J. Fortier, A. Goupil, J. Lortie and J. Tremblay, Exhaustive generation of gominoes, Theoretical Computer Science, 502 (2013), 76-87.

Crossrefs

Sequence in context: A149541 A149542 A089794 * A039510 A149543 A149544

Adjacent sequences: A216818 A216819 A216820 * A216822 A216823 A216824

Keyword

nonn,more

Author

N. J. A. Sloane, Sep 20 2012

Status

approved