A216818 Number of simply 4-connected polyominoes of site-perimeter n.

1, 0, 2, 4, 12, 32, 110, 340, 1193, 4080, 14786, 53428

Offset

4,3

Links

Table of n, a(n) for n=4..15.

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

Crossrefs

Sequence in context: A148193 A341344 A002528 * A216819 A216820 A148194

Adjacent sequences: A216815 A216816 A216817 * A216819 A216820 A216821

Keyword

nonn,more

Author

N. J. A. Sloane, Sep 20 2012

Status

approved