A166019 Right edge of triangular table A138612.

1, 4, 12, 28, 53, 91, 141, 207, 297, 401, 534, 683, 869, 1081, 1327, 1601, 1912, 2275, 2665, 3095, 3569, 4110, 4682, 5314, 5996, 6744, 7535, 8394, 9320, 10303, 11367, 12490, 13686, 14938, 16288, 17707, 19227, 20808, 22490, 24233, 26103, 28033

Offset

1,2

Links

Table of n, a(n) for n=1..42.

Crossrefs

a(n) = A138612(A000217(n)).

Sequence in context: A192736 A109629 A112087 * A184633 A006000 A161216

Adjacent sequences: A166016 A166017 A166018 * A166020 A166021 A166022

Keyword

nonn

Author

Antti Karttunen, Oct 05 2009

Status

approved