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 A299206 #17 Feb 16 2025 08:33:53
%S A299206 1,4830,-25499225,-359001100500,-488895969711875,15167983076643206250,
%T A299206 97133231781274332671875,-271470664160664028370625000,
%U A299206 -6054036890966043032024015234375,-15985594659896064584391569753906250,218396847859403327980436336954599609375
%N A299206 Ramanujan's tau function (or tau numbers (A000594)) for 5^n.
%H A299206 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TauFunction.html">Tau Function</a>
%H A299206 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (4830, -48828125).
%F A299206 G.f.: 1/(1-4830*x+48828125*x^2).
%F A299206 a(n) = A000594(A000351(n)). - _Michel Marcus_, Feb 05 2018
%t A299206 RamanujanTau[5^Range[0,10]] (* _Harvey P. Dale_, Jun 06 2024 *)
%o A299206 (PARI) {a(n) = ramanujantau(5^n)}
%Y A299206 Cf. A000594, A000351, A035174, A064556.
%K A299206 sign
%O A299206 0,2
%A A299206 _Seiichi Manyama_, Feb 05 2018