A030226 Number of n-celled polyhexes (hexagonal polyominoes) without bilateral symmetry.

0, 0, 0, 3, 11, 65, 287, 1373, 6370, 30149, 142638, 681520, 3270604, 15789461, 76562081, 372832744, 1822142769, 8934740804, 43938715224, 216650217219, 1070791145115, 5303851997213, 26323053574543, 130878372709130, 651812928565763, 3251215398061949, 16240020484212325, 81227147300622466, 406770969577924068, 2039375196443918387

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Links

• John Mason, Table of n, a(n) for n = 1..36

Crossrefs

Cf. A000228, A030225.

Extensions

More terms from Joseph Myers, Sep 21 2002

a(21)-a(30) from John Mason, Jul 18 2023