This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A276594 #12 Jul 16 2017 15:17:59
%S A276594 1,1,1,1,1,691,1,3617,43867,174611,77683,236364091,657931,3392780147,
%T A276594 1723168255201,7709321041217,151628697551,26315271553053477373,
%U A276594 154210205991661,261082718496449122051,1520097643918070802691,2530297234481911294093
%N A276594 Numerator of the rational part of the sum of reciprocals of even powers of even numbers, i.e., Sum_{k>=1} 1/(2*k)^(2*n).
%F A276594 A276592(n)/A276593(n) + a(n)/A276595(n) = A046988(n)/A002432(n).
%p A276594 seq(numer(sum(1/(2*k)^(2*n),k=1..infinity)/Pi^(2*n)),n=1..24);
%Y A276594 Cf. A002432, A046988, A276592, A276593, A276595.
%K A276594 nonn,frac
%O A276594 1,6
%A A276594 _Martin Renner_, Sep 07 2016