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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; internal format)
OFFSET

1,2

REFERENCES

Dan Hoey, Bill Gosper and Rich Schroeppel, Discussions in Math-Fun Mailing list, circa Jul 13 1999.

LINKS

R. C. Schroeppel, A few mathematical experiments

CROSSREFS

A row of A094166.

Sequence in context: A002927 A126640 A093132 * A129325 A001267 A099156

Adjacent sequences:  A094166 A094167 A094168 * A094170 A094171 A094172

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), May 06 2004

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Last modified February 16 14:07 EST 2012. Contains 205930 sequences.