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A216818
Number of simply 4-connected polyominoes of site-perimeter n.
2
1, 0, 2, 4, 12, 32, 110, 340, 1193, 4080, 14786, 53428
OFFSET
4,3
LINKS
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
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Sep 20 2012
STATUS
approved