%I A068528
%S A068528 5,15,25,35,45,55,65,75,85,95,105,115,125,135,145,155,165,185,195,205,
%T A068528 215,225,235,245,255,265,275,285,295,305,315,335,345,355,365,375,395,
%U A068528 405,415,445,455,465,475,485,495,505,515,525,535,545,555,565,575,585
%N A068528 Let N(2n) denote the numerator of B(2n), the 2n-th Bernoulli number and 
               D(2n) the denominator, sequence gives values of n such that gcd(N(2n),
               D(2n-2))=5.
%C A068528 built with Elemer Labos (LABOS(AT)ana.sote.hu). All terms are of the 
               form 5+10*k. If in almost cases a(n+1)-a(n)=10 there are some jumps 
               : a(18)-a(17)=20.
%Y A068528 Cf. A007703.
%Y A068528 Sequence in context: A121025 A031322 A017329 this_sequence A061443 A147495 
               A147426
%Y A068528 Adjacent sequences: A068525 A068526 A068527 this_sequence A068529 A068530 
               A068531
%K A068528 easy,nonn
%O A068528 1,1
%A A068528 Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 21 2002