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A124238 Terms of A123857 that are not powers of 2. 1
38, 205, 316, 736, 3776, 4916, 5888, 7736, 11138, 22287, 23308, 23924, 39538, 62336, 71936 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
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,...
LINKS
CROSSREFS
Sequence in context: A005910 A281769 A191698 * A020870 A211502 A259518
KEYWORD
hard,more,nonn
AUTHOR
Alexander Adamchuk, Oct 22 2006
EXTENSIONS
More terms from Max Alekseyev, Sep 13 2009
STATUS
approved

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Last modified July 12 12:19 EDT 2024. Contains 374247 sequences. (Running on oeis4.)