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 A033464 #22 Jul 08 2025 19:52:16
%S A033464 1,3,-1,-26,29,756,-1793,-45744,189513,4700260,-30515629,-730341600,
%T A033464 6948349069,159130156836,-2123506814505,-46081244842304,
%U A033464 838034409016721,17029766318842692,-414549408916313189,-7774211453384941440,251026027696302116181,4263756050277024153028
%N A033464 Logarithmic (or "LOG") transform of squares A000290.
%H A033464 Alois P. Heinz, <a href="/A033464/b033464.txt">Table of n, a(n) for n = 0..435</a>
%F A033464 E.g.f.: exp(x)*(1 + 3*x + x^2)/(1 + exp(x)*x*(1 + x)). - _Ilya Gutkovskiy_, Mar 06 2018
%p A033464 logtr:= proc(p) local b; b:= proc(n) option remember; if n=0 then 1 else p(n)- add(k *binomial(n,k) *p(n-k) *b(k), k=1..n-1)/n fi end; n->b(n+1) end: a:= logtr(n-> n^2): seq(a(n), n=0..25); # _Alois P. Heinz_, Sep 14 2008
%t A033464 With[{nn=30},CoefficientList[Series[(Exp[x](1+3x+x^2))/(1+Exp[x]x(1+x)),{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Feb 03 2019 *)
%Y A033464 Cf. A000290, A033462.
%K A033464 sign
%O A033464 0,2
%A A033464 _N. J. A. Sloane_