%I #9 Jan 06 2019 12:41:06
%S -5,-2,-1,1,7,2663,1247,1511,1623817,10405289,21491081,2523785339,
%T 1827648887,11254630547,596303510772251,8834901408462277,
%U 105697073459989,12745379713118458459,455443615848938396081
%N Numerator of |Bernoulli(2n+2)| - |Bernoulli(2n)|.
%H <a href="/index/Be#Bernoulli">Index entries for sequences related to Bernoulli numbers.</a>
%t Abs[#[[2]]]-Abs[#[[1]]]&/@Partition[BernoulliB[Range[0,40,2]],2,1]// Numerator (* _Harvey P. Dale_, Jan 06 2019 *)
%K sign,frac
%O 0,1
%A _N. J. A. Sloane_.