A096361 Total number of triangles in all polyiamonds with n triangles.

1, 2, 3, 12, 20, 72, 168, 528, 1440, 4480, 13046, 40008, 120055, 366324, 1109745, 3380752, 10269819, 31253904, 95011267, 288979680, 878550498, 2671223720, 8120041693, 24682865208, 75020015675, 227999634772, 692872971246, 2105464666676

Offset

1,2

Links

Table of n, a(n) for n=1..28.

S. T. Coffin, The Puzzling World of Polyhedral Dissections, Chap 2, Table 1.

Crossrefs

a(n) = n*A000577(n).

Sequence in context: A126292 A083265 A067391 * A105045 A205825 A076000

Adjacent sequences: A096358 A096359 A096360 * A096362 A096363 A096364

Keyword

nonn

Author

N. J. A. Sloane, Aug 04 2004

Status

approved