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 A186722 a(n) = numerator of Sum_{k=1..p-1} 1/k^2 for p the n-th prime. 1
 1, 5, 205, 5369, 1968329, 240505109, 822968714749, 238820721143261, 354019312583809, 10383930672892966877209, 8745363341445960333910369, 33729537728506506466441425661, 46252969210499754415427421586309, 11115284554577186575391010113969347, 20577813589884143264711540636313749803 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS R. Mestrovic, Wolstenholme's theorem: Its Generalizations and Extensions in the last hundred and fifty years (1862-2011), arXiv:1111.3057 [math.NT], 2011. MAPLE f3:=proc(n) local p; p:=ithprime(n); numer(add(1/i^2, i=1..p-1)); end proc; [seq(f3(n), n=1..20)]; PROG (PARI) a(n) = my(p=prime(n)); numerator(sum(k=1, p-1, 1/k^2)); \\ Michel Marcus, Apr 05 2015 CROSSREFS Cf. A125551, A186720, A061002. Sequence in context: A128678 A232987 A012811 * A060486 A002438 A005333 Adjacent sequences:  A186719 A186720 A186721 * A186723 A186724 A186725 KEYWORD nonn AUTHOR N. J. A. Sloane, Jan 21 2012 STATUS approved

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Last modified November 21 07:11 EST 2017. Contains 294996 sequences.