A038147 - OEIS

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A038147

Number of polyhexes with n cells.

8

1, 1, 3, 7, 22, 83, 341, 1519, 7114, 34350

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

LINKS

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

J. V. Knop, K. Szymanski, Ž. Jeričević, and N. Trinajstić, On the total number of polyhexes, Match, No. 16 (1984), 119-134.

Louis Marin, Counting Polyominoes in a Rectangle b X h, arXiv:2406.16413 [cs.DM], 2024. See p. 145.

CROSSREFS

See A000228 for another version of this sequence.

Cf. A018190, A038143-A038146.

Sequence in context: A187982 A000228 A108070 * A252784 A364627 A082271

Adjacent sequences: A038144 A038145 A038146 * A038148 A038149 A038150

KEYWORD

nonn,hard,more

AUTHOR

N. J. A. Sloane.

STATUS

approved