A373637 Number of free n-celled polyiamonds to which two inequivalent cells can be adjoined such that the two resulting free (n+1)-celled polyiamonds are identical.

0, 0, 0, 0, 1, 0, 0, 3, 0, 1, 8, 0, 6, 24, 1, 22

Offset: 1

Author

Pontus von Brömssen, Jun 13 2024

Keywords

• nonn
• more

Comments

Two cells that can be adjoined to an n-celled polyiamond are equivalent if there is an isomorphism between the two resulting (n+1)-celled polyiamonds that maps the adjoined cell of the first to the adjoined cell of the second.

Links

• Pontus von Brömssen, Illustration up to n = 13.
• Index entries for sequences related to polyominoes.

Crossrefs

Cf. A369366, A373635, A373636.