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A166019 Right edge of triangular table A138612. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified November 20 02:34 EST 2019. Contains 329323 sequences. (Running on oeis4.)