A089456 Number of n-celled polyominoes with exactly 4 holes.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 179, 2509, 25609, 214932, 1578984, 10536260, 65411645, 383981499, 2156114468

Offset: 1

Author

Joseph Myers, Nov 04 2003

Keywords

• hard
• nonn

Links

• Tomás Oliveira e Silva, Animal enumerations on the {4,4} Euclidean tiling

Crossrefs

Cf. A001419, A057418, A089454, A089455, A089457, A089458.