A373636 - OEIS

A373636

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

0, 0, 0, 1, 1, 0, 7, 8, 0, 40

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OFFSET

1,7

COMMENTS

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

LINKS

Table of n, a(n) for n=1..10.

Pontus von Brömssen, Illustration up to n = 8.

Index entries for sequences related to polyominoes.

CROSSREFS

Cf. A369363, A373635, A373637.

Sequence in context: A359255 A188485 A093828 * A010514 A073004 A256670

Adjacent sequences: A373633 A373634 A373635 * A373637 A373638 A373639

KEYWORD

nonn,more

AUTHOR

Pontus von Brömssen, Jun 13 2024

STATUS

approved