A057408 Number of self-avoiding polygons of area n with 3 (self-avoiding polygon) holes on square lattice (not allowing rotations).

10, 212, 2530, 22640, 169906, 1131904, 6920388, 39668532, 216315230, 1133876128, 5757104542, 28478125312, 137854314576, 655307492388, 3067528095994, 14171567365156, 64732059542906, 292778085749036

Offset: 18

Author

N. J. A. Sloane, Aug 30 2000

Keywords

• nonn

Links

• I. Jensen, Table of n, a(n) for n = 18..47 (from link below)
• I. Jensen, More terms