A152539 Partial sum of A146538.

6, 18, 36, 58, 82, 112, 144, 180, 222, 268, 316, 368, 422, 482, 544, 610, 682, 756, 834, 916, 1000, 1088, 1178, 1270, 1366, 1468, 1576, 1688, 1802, 1918, 2036, 2156, 2278, 2404, 2534, 2666, 2804, 2944, 3086, 3230, 3380

Offset

1,1

Links

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Mathematica

Accumulate[Select[2*Range[150], !PrimeQ[#+3]&]] (* Harvey P. Dale, Jun 04 2016 *)

Prog

(PARI) lista(nn) = {ps = 0; forstep (n=2, nn, 2, if (! isprime(n+3), ps += n; print1(ps, ", ")); ); } \\ Michel Marcus, Jun 04 2013

Crossrefs

Cf. A146538.

Sequence in context: A358843 A328586 A172522 * A069958 A028896 A295026

Adjacent sequences: A152536 A152537 A152538 * A152540 A152541 A152542

Keyword

easy,nonn

Author

Giovanni Teofilatto, Dec 07 2008

Extensions

More terms from Michel Marcus, Jun 04 2013

Status

approved