A138981 a(n) = Sum_{k=0..n} A138980(k).

1, 4, 9, 16, 27, 40, 57, 76, 99, 128, 159, 196, 237, 280, 327, 380, 441, 508, 579, 652, 731, 814, 903, 1000, 1101, 1204, 1311, 1420, 1533, 1660, 1791, 1928, 2067, 2216, 2367, 2524, 2691, 2864, 3043, 3224, 3415, 3608, 3805, 4004, 4215, 4438, 4665, 4894

Offset

0,2

Comments

By definition, every term is nonprime (i.e., is 1 or composite).

Links

Table of n, a(n) for n=0..47.

Crossrefs

Cf. A138980.

Sequence in context: A213495 A109593 A237589 * A138993 A339330 A008019

Adjacent sequences: A138978 A138979 A138980 * A138982 A138983 A138984

Keyword

nonn

Author

Leroy Quet, Apr 05 2008

Extensions

Extended by R. J. Mathar, May 21 2010

Status

approved