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 A120289 Primes p such that p divides numerator of Sum[1/Prime[k]^Prime[n],{k,1,n-1}]. 2
 5, 19, 47, 79, 109 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE a(1) = 5 because prime 5 divides 275 = numerator[1/2^5 + 1/3^5]. Sum[1/Prime[k]^Prime[n],{k,1,n-1}] begins n=2 1/2^3 = 1/8 n=3 1/2^5 + 1/3^5 = 275/7776 n=4 1/2^7 + 1/3^7 + 1/5^7 = 181139311/21870000000 n=5 1/2^11 + 1/3^11 + 1/5^11 + 1/7^11 = 17301861338484245234233/35027750054222100000000000 CROSSREFS Cf. A119722. Sequence in context: A146736 A176358 A045458 * A293457 A243895 A024191 Adjacent sequences:  A120286 A120287 A120288 * A120290 A120291 A120292 KEYWORD frac,nonn AUTHOR Alexander Adamchuk, Jul 08 2006 STATUS approved

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Last modified June 23 18:45 EDT 2021. Contains 345402 sequences. (Running on oeis4.)