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 A113147 #8 Sep 08 2013 13:30:50
%S A113147 1,1,2,10,110,1954,47270,1437562,52531310,2239259266,109021857446,
%T A113147 5966767051354,362558298692270,24214789406313442,1763062297639690790,
%U A113147 138975554045857840570,11790733617760291994990,1071215297856049456744642
%N A113147 Row 6 of table A113143; equal to INVERT of 6-fold factorials shifted one place right.
%F A113147 a(n) = Sum_{j=0..k} 6^(k-j)*A111146(k, j).
%F A113147 a(0) = 1; a(n+1) = Sum_{k=0..n} a(k)*A008542(n-k).
%e A113147 A(x) = 1 + x + 2*x^2 + 10*x^3 + 110*x^4 + 1954*x^5 +...
%e A113147 = 1/(1 - x - x^2 - 7*x^3 - 91*x^4 -...- A008542(n)*x^(n+1)
%e A113147 -...).
%o A113147 (PARI) {a(n)=local(x=X+X*O(X^n)); A=1/(1-x-x^2*sum(j=0,n,x^j*prod(i=0,j,6*i+1)));return(polcoeff(A,n,X))}
%Y A113147 Cf. A113143, A008542 (6-fold factorials).
%K A113147 nonn
%O A113147 0,3
%A A113147 _Philippe Deléham_ and _Paul D. Hanna_, Oct 28 2005