Search: id:A113347
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%I A113347
%S A113347 1,6,39,327,3556,48659,812462,16136404,373415239,9900007028,
%T A113347 296557405704,9921937128500,367181525916035,14906571298831661,
%U A113347 659191947156441025,31558799717042019635,1626968083690674214906
%N A113347 Column 1 of triangle A113345, also equals column 0 of A113350^3.
%C A113347 A113345 is the matrix square of A113340.
%o A113347 (PARI) {a(n)=local(A,B);A=matrix(1,1);A[1,1]=1;for(m=2,n+2,B=matrix(m,
               m); for(i=1,m, for(j=1,i,if(i<3|j==i|j>m-1,B[i,j]=1,if(j==1, B[i,
               1]=1,B[i,j]=(A^(2*j-1))[i-j+1,1]));));A=B);(A^2)[n+2,2]}
%Y A113347 Cf. A113340, A113345, A113346 (column 0), A113348 (column 2), A113349 
               (column 3); A113350.
%Y A113347 Sequence in context: A137972 A007322 A058191 this_sequence A031972 A124577 
               A006678
%Y A113347 Adjacent sequences: A113344 A113345 A113346 this_sequence A113348 A113349 
               A113350
%K A113347 nonn
%O A113347 0,2
%A A113347 Paul D. Hanna (pauldhanna(AT)juno.com), Nov 08 2005

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