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 A273193 #9 Jun 07 2016 05:54:00 %S A273193 1,2,-16,904,-25792,971936,-135875584,7531512832,-483853915136, %T A273193 318210896625152,-26070230641872896,2367374418301892608, %U A273193 -708155254090757373952,76928188353501090512896,-9044296958948501037252608,3432739126498593173574909952,-465041552940366454298747600896 %N A273193 Numerators of the nonzero coefficients in the expansion of 1/hypergeom([Seq_{k=1..m-1} k/m], [], (x/m)^m) for m = 3. %p A273193 Blist := proc(m, size) local H, S; %p A273193 H := m -> hypergeom([seq(k/m, k=1..m-1)], [], (x/m)^m); %p A273193 S := m -> series(1/H(m), x, (m+1)*size); %p A273193 seq((-1)^n*numer(coeff(S(m), x, m*n)), n=0..size) end: %p A273193 A273193_list := size -> Blist(3, size); %Y A273193 Cf. A000012 (m=1), A002596 (m=2), A273192, A273194. %K A273193 sign,frac %O A273193 0,2 %A A273193 _Peter Luschny_, Jun 06 2016