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 A183067 #7 Mar 12 2022 13:24:01
%S A183067 1,2,28,248,3976,52112,850144,13032896,217878616,3594283952,
%T A183067 61577419168,1056910842176,18485891235904,325146542386304,
%U A183067 5781811796793088,103413141115923968,1863085674077321176,33737014083314312624
%N A183067 G.f.: A(x) = Sum_{n>=0} (4n)!/n!^4 * x^(2n)/(1-2*x)^(4n+1).
%F A183067 Row sums of triangle A183065.
%o A183067 (PARI) {a(n)=polcoeff(sum(m=0,n,(4*m)!/m!^4*x^(2*m)/(1-2*x+x*O(x^n))^(4*m+1)),n)}
%Y A183067 Cf. A183065, A183066, A183068.
%K A183067 nonn
%O A183067 0,2
%A A183067 _Paul D. Hanna_, Dec 22 2010