A130867 Triangular polyominoes (or polyiamonds) with n cells at most (turning over is allowed, holes are allowed, must be connected along edges).

1, 2, 3, 6, 10, 22, 46, 112, 272, 720, 1906, 5240, 14475, 40641, 114624, 325921, 930028, 2666356, 7666949, 22115933, 63951671, 185370931, 538416222, 1566868939, 4567669566, 13336886288, 38998848186, 114194014853

Offset: 1

Author

Tanya Khovanova, Jul 23 2007

Keywords

• nonn

Crossrefs

Partial sums of A000577.