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A094169 Number of rooted 2-dimensional polyominoes with n octagonal cells, with no symmetries removed. 1
1, 8, 60, 440, 3230, 23688, 173796, 1275240, 9359748, 68708320, 504466468, 3704376384, 27205146592 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
REFERENCES
Dan Hoey, Bill Gosper and Richard C. Schroeppel, Discussions in Math-Fun Mailing list, circa Jul 13 1999.
LINKS
Daniel J. Heath and R. Robert Rdyberg, III, On Polyominoes and Digital Cameras, Mathematics Magazine, Vol. 90, No. 2 (April 2017), pp. 135-141.
CROSSREFS
A row of A094166.
Sequence in context: A274800 A126640 A093132 * A129325 A285391 A001267
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 06 2004
STATUS
approved

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Last modified May 30 03:30 EDT 2024. Contains 372957 sequences. (Running on oeis4.)