A006726 Number of n-celled polygons with perimeter 2n on square lattice.

1, 8, 40, 168, 676, 2672, 10376, 39824, 151878, 576656, 2181496, 8229160, 30974700, 116385088, 436678520, 1636472360, 6126647748

Offset: 4

Author

N. J. A. Sloane, Simon Plouffe

Keywords

• nonn

References

• N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

• I. G. Enting and A. J. Guttmann, On the area of square lattice polygons, J. Statist. Phys., 58 (1990), 475-484.