A390622 Number of fixed polynars with n cells.

1, 6, 46, 391, 3527, 33048, 317980, 3119857, 31072574, 313164134, 3186749054, 32687751727, 337547835901

Offset

1,2

Comments

See A390620 for details.

Links

Table of n, a(n) for n=1..13.

John Mason, Enumerating fixed polynars of size 13

Index entries for sequences related to polyominoes.

Crossrefs

Cf. A001168, A390620 (free), A390621 (one-sided).

Sequence in context: A386811 A271933 A380685 * A084772 A388914 A199563

Adjacent sequences: A390619 A390620 A390621 * A390623 A390624 A390625

Keyword

nonn,more

Author

Pontus von Brömssen, Nov 14 2025

Extensions

a(11)-a(12) from Christian Sievers, Nov 15 2025

a(13) from John Mason, Jan 21 2026

Status

approved