A094168 Number of rooted 2-dimensional polyominoes with n heptagonal cells, with no symmetries removed.

1, 7, 42, 252, 1505, 8946, 53165, 315980, 1878597, 11171930, 66456082, 395399760, 2352979538, 14004512886

Offset

1,2

References

Dan Hoey, Bill Gosper and Richard C. Schroeppel, Discussions in Math-Fun 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: A053142 A214941 A162941 * A163345 A163923 A164369

Adjacent sequences: A094165 A094166 A094167 * A094169 A094170 A094171

Keyword

nonn

Author

N. J. A. Sloane, May 06 2004

Status

approved