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 A006147 #18 Jan 07 2025 01:58:26
%S A006147 1,24,900,40352,1994322,104816880,5747466920,325077729600,
%T A006147 18826860841119,1110900168420264,66547088543789532,
%U A006147 4036419643768799328,247405021070280491110,15299980644645295780560,953473460271200881693560,59817824263728235912396224
%N A006147 Reversion of Ramanujan numbers.
%H A006147 Amiram Eldar, <a href="/A006147/b006147.txt">Table of n, a(n) for n = 1..100</a>
%H A006147 G. Kreweras and Y. Poupard, <a href="/A000806/a000806.pdf">Sur les partitions en paires d'un ensemble fini totalement ordonné</a>, Publications de l'Institut de Statistique de l'Université de Paris, 23 (1978), 57-74. (Annotated scanned copy)
%H A006147 <a href="/index/Res#revert">Index entries for reversions of series</a>.
%F A006147 REVERT(A000594).
%e A006147 x + 24*x^2 + 900*x^3 + 40352*x^4 + 1994322*x^5 + 104816880*x^6 + ...
%t A006147 Rest[CoefficientList[InverseSeries[Series[q * QPochhammer[q, q]^24, {q, 0, 16}]], q]] (* _Amiram Eldar_, Jan 06 2025 *)
%Y A006147 Cf. A000594.
%K A006147 nonn
%O A006147 1,2
%A A006147 _N. J. A. Sloane_
%E A006147 Signs corrected Dec 24 2001