A369366 Least number of inequivalent cells in a polyiamond with n cells.

1, 1, 2, 2, 3, 1, 3, 3, 3, 3, 6, 2, 4, 4, 4, 4, 9, 2

Offset: 1

Author

Pontus von Brömssen, Jan 22 2024

Keywords

• nonn
• more

Comments

Equivalently, a(n) is the least number of free rooted (or pointed) polyiamonds (A369365) corresponding to a given polyiamond with n cells.

Links

• Index entries for sequences related to polyominoes.

Crossrefs

Cf. A000577, A367758, A369363, A369365, A369367.

Extensions

a(18) from John Mason, Sep 20 2024