A124238 Terms of A123857 that are not powers of 2.

38, 205, 316, 736, 3776, 4916, 5888, 7736, 11138, 22287, 23308, 23924, 39538, 62336, 71936

Offset: 1

Author

Alexander Adamchuk, Oct 22 2006

Keywords

• hard
• more
• nonn

Comments

A123857 list composite indices n that divide A123855(n-1) = Sum[ Sum[ Prime[i]^j, {i,1,n-1}], {j,1,n-1}]. Corresponding indices n such that A123857(n) belongs to this sequence are 5,8,10,12,...

Crossrefs

Cf. A123857, A123856, A123855.

Extensions

More terms from Max Alekseyev, Sep 13 2009