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 A256671 #24 Apr 23 2015 10:03:07 %S A256671 1,-1,2,-1,-1,1,-1,-1,7,5,-2663,-691,1247,7,-1511,-3617,1623817,43867, %T A256671 -10405289,-174611,21491081,854513,-2523785339,-236364091,1827648887, %U A256671 8553103,-11254630547,-23749461029,596303510772251,8615841276005 %N A256671 Numerators of the inverse binomial transform of Bernoulli(n+2). %C A256671 See the denominators, multiples of 3, A256675(n). %C A256671 a(n) is the numerator of the n-th term of the first column of the difference table of B(n+2). %C A256671 Inverse binomial transform of B(n+2): 1/6, -1/6, 2/15, -1/15, -1/105, 1/21, -1/105, -1/15, 7/165, 5/33, ... . %F A256671 a(2n) = A051720(2n). %F A256671 a(2n+3) = A164555(2n+4). %Y A256671 Cf. A256675, A051720, A164555. %K A256671 sign,frac %O A256671 0,3 %A A256671 _Paul Curtz_, Apr 23 2015