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 A106339 #3 Mar 30 2012 18:36:45
%S A106339 1,2,6,30,270,4830,189630,16912350,3353412510,1432516194270,
%T A106339 1288072947428190,2400557459496515550,9177479849690707865310,
%U A106339 71463760915341917360748510,1127799535042492118475108550110
%N A106339 Absolute row sums of triangle A106338.
%o A106339 (PARI) {a(n)=sum(k=0,n,k!*abs((matrix(n+1,n+1,r,c,if(r>=c,(r-c)!* sum(m=0,r-c+1,(-1)^(r-c+1-m)*m^r/m!/(r-c+1-m)!)))^-1)[n+1,k+1]))}
%Y A106339 Cf. A106338.
%K A106339 nonn
%O A106339 0,2
%A A106339 _Paul D. Hanna_, May 01 2005