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 A372493 #9 May 03 2024 12:12:43
%S A372493 0,1,4,2,12,-30,24,1412,-18716,127750,-19448,-10721556,98983992,
%T A372493 546122580,-19718580272,30721006440,4638904011364,-44204880124922,
%U A372493 -1218793973236472,26364933421291468,327900715232299304,-15425392878552410820,-62258050574118828336
%N A372493 G.f. A(x) satisfies A(A(x)) = Sum_{k>=1} k^2 * 2^(k-1) * x^k.
%H A372493 Dmitry Kruchinin, Vladimir Kruchinin, <a href="http://arxiv.org/abs/1302.1986">Method for solving an iterative functional equation $A^{2^n}(x)=F(x)$</a>, arXiv:1302.1986 [math.CO], 2013.
%Y A372493 Cf. A014477, A309509.
%K A372493 sign
%O A372493 0,3
%A A372493 _Seiichi Manyama_, May 03 2024