

A051738


Number of rooted 2dimensional polyominoes with n pentagonal cells, with no symmetries removed.


3



1, 5, 30, 180, 1075, 6366, 37520, 220500, 1293615, 7581240, 44398387, 259881960, 1520633270, 8895116230
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OFFSET

1,2


COMMENTS

Number of polypents (like polyominoes, with pentagons) with n cells. These are anchored polypents, with no culling for reflection or rotation (or translation) isomorphism.


REFERENCES

Dan Hoey, Bill Gosper and Richard C. Schroeppel, Discussions in MathFun Mailing list, circa Jul 13 1999.


LINKS

Table of n, a(n) for n=1..14.
R. C. Schroeppel, A few mathematical experiments


CROSSREFS

A row of A094166.
Sequence in context: A105481 A242157 A094167 * A052934 A136785 A227383
Adjacent sequences: A051735 A051736 A051737 * A051739 A051740 A051741


KEYWORD

nonn


AUTHOR

Richard C. Schroeppel, Feb 13 2002


EXTENSIONS

More terms from N. J. A. Sloane, May 06 2004
Edited by N. J. A. Sloane, Sep 15 2008 at the suggestion of R. J. Mathar


STATUS

approved



