# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a101484 Showing 1-1 of 1 %I A101484 #4 Mar 30 2012 18:36:44 %S A101484 1,2,3,7,33,285,3648,61306,1270440,31244205,888288960,28640745684, %T A101484 1032065614715,41087944243649,1790413981105727,84737880414848784, %U A101484 4327877295100145382,237218770042549151701,13887772416031152573506 %N A101484 Row sums of triangular matrix A101479, in which row n equals row (n-1) of A101479^(n-1) followed by '1'. %o A101484 (PARI) {a(n)=local(A=Mat(1),B);for(m=1,n+1,B=matrix(m,m);for(i=1,m, for(j=1,i, if(j==i,B[i,j]=1,B[i,j]=(A^(i-2))[i-1,j]);));A=B); return(sum(k=1,n+1,A[n+1,k]))} %K A101484 nonn %O A101484 0,2 %A A101484 _Paul D. Hanna_, Jan 21 2005 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE