A089457 Number of n-celled polyominoes with exactly 5 holes.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 21, 573, 9140, 105417, 982767, 7919375, 57387444, 383757344, 2410292366

Offset

1,20

Links

Table of n, a(n) for n=1..28.

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

Crossrefs

Cf. A001419, A057418, A089454, A089455, A089456, A089458.

Sequence in context: A341572 A199254 A199199 * A265631 A352433 A009091

Adjacent sequences: A089454 A089455 A089456 * A089458 A089459 A089460

Keyword

hard,more,nonn

Author

Joseph Myers, Nov 04 2003

Extensions

a(27)-a(28) from Tomás Oliveira e Silva's page added by Andrei Zabolotskii, Sep 15 2025

Status

approved