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 A373715 #11 Aug 04 2024 10:15:04
%S A373715 1,6,42,284,1938,13188,89828,611640,4165218,28363252,193145388,
%T A373715 1315249800,8956413716,60990068520,415321615368,2828197518960,
%U A373715 19259058052098,131147584691796,893070155862492,6081501856336488,41412945154765212,282007973308889592
%N A373715 Expansion of 1/(2 - (1 + 4*x)^(3/2)).
%F A373715 a(n) = 4^n * Sum_{k>=0} (1/2)^(k+1) * binomial(3*k/2,n).
%o A373715 (PARI) my(N=30, x='x+O('x^N)); Vec(1/(2-(1+4*x)^(3/2)))
%Y A373715 Cf. A126984, A373816.
%K A373715 nonn,easy
%O A373715 0,2
%A A373715 _Seiichi Manyama_, Aug 04 2024