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 A366629 Sum of the divisors of 6^n+1. 10
 3, 8, 38, 256, 1298, 9792, 52136, 338580, 1778436, 11889152, 62367272, 414625216, 2178461956, 15224775552, 80673299432, 611106029568, 2830769440776, 19344856702976, 115255634181184, 696800841097536, 3748220725527432, 27388329197137920, 135183433256806480 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Max Alekseyev, Table of n, a(n) for n = 0..420 FORMULA a(n) = sigma(6^n+1) = A000203(A062394(n)). EXAMPLE a(3)=256 because 6^3+1 has divisors {1, 7, 31, 217}. MAPLE a:=n->numtheory[sigma](6^n+1): seq(a(n), n=0..100); CROSSREFS Cf. A062394, A000203, A057938, A366622, A366617, A366627, A366628, A366630, A366670. Cf. A069061, A366578, A366607, A366617, A366638, A366657, A366666, A366668, A366689, A366715. Sequence in context: A099030 A264657 A190658 * A106558 A065914 A288759 Adjacent sequences: A366626 A366627 A366628 * A366630 A366631 A366632 KEYWORD nonn AUTHOR Sean A. Irvine, Oct 14 2023 STATUS approved

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Last modified February 21 06:00 EST 2024. Contains 370219 sequences. (Running on oeis4.)