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 A176424 Partial sums of A029876. 0
 1, 3, 6, 23, 50 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Partial sums of number of Giuga sequences of length n. The only known primes in this partial sum are 3 and 23. LINKS FORMULA a(n) = SUM[i=0..n] A029876(i) = SUM[i=0..n] {numbers i such that p divides i/p - 1 for every prime divisor p of i}. EXAMPLE a(4) = 1 + 2 + 3 + 17 + 27 = 50. CROSSREFS Cf. A007850, A029876. Sequence in context: A117850 A090910 A256674 * A151443 A148643 A240646 Adjacent sequences:  A176421 A176422 A176423 * A176425 A176426 A176427 KEYWORD nonn AUTHOR Jonathan Vos Post, Apr 17 2010 STATUS approved

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Last modified October 16 02:52 EDT 2019. Contains 328038 sequences. (Running on oeis4.)