A249679 Terms of A007504 divisible by 3.

0, 129, 381, 501, 639, 963, 1161, 1371, 1593, 1851, 2127, 2427, 3087, 3447, 3831, 4227, 5589, 6081, 6870, 10191, 10887, 12339, 13101, 13887, 14697, 15537, 16401, 17283, 18189, 19113, 22548, 23592, 25800, 26940, 28104, 30504, 31734, 35568, 36888, 38238, 39612, 41022, 42468, 46191

Offset

1,2

Comments

Conjecture: a(n) ~ 4.5 n^2 log n. - Charles R Greathouse IV, Nov 03 2014

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Example

a(2) = 129 = A007504(10), a(3) = 381 = A007504(16).

Prog

(PARI) print1(s=0); forprime(p=2, 1e4, s+=p; if(s%3==0, print1(", "s))) \\ Charles R Greathouse IV, Nov 03 2014

Crossrefs

Intersection of A007504 and A008585. Cf. A007504, A008585, A024011, A045345, A128165, A189072.

Sequence in context: A157951 A043383 A250814 * A250750 A036548 A046286

Adjacent sequences: A249676 A249677 A249678 * A249680 A249681 A249682

Keyword

nonn,easy

Author

Zak Seidov, Nov 03 2014

Status

approved