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 A108292 #6 Jun 14 2015 00:42:59
%S A108292 1,3,19,195,2751,49413,1079079,27760323,822299383,27565191753,
%T A108292 1031671508495,42643092165765,1929325374428791,94835735736471369,
%U A108292 5032700868665421519,286770182910733076163,17463186681730290301671
%N A108292 Row sums of triangle A108290.
%F A108292 a(n) = Sum_{k=0..n} A108267(n, k)*2^k.
%o A108292 (PARI) a(n)=local(X=x+x*O(x^n));sum(k=0,n, polcoeff(sum(j=0,n,binomial(n+n*j+j,n*j+j)*(x/(1+X))^j)/(1+X),k))
%o A108292 (PARI) a(n)=sum(k=0,n,2^k*polcoeff( (1-x)^(n+1)*sum(j=0,n,binomial(n+n*j+j,n*j+j)*x^j),k))
%Y A108292 Cf. A108267, A060543, A108290.
%K A108292 nonn
%O A108292 0,2
%A A108292 _Paul D. Hanna_, May 31 2005