Search: id:A102088
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%I A102088
%S A102088 1,3,10,49,367,3850,52173,868614,17199370,395757887,10396896795,
%T A102088 307511681367,10124396776169,367567456615441,14598938725992903,
%U A102088 630060602243145513,29375322688053255480,1472008290120323375502
%N A102088 Row sums of triangular matrix A102086, which shifts upward to exclude 
               the main diagonal under matrix square.
%o A102088 (PARI) {a(n)=local(A=matrix(2,2),B);A[1,1]=1; for(m=2,n+1,B=matrix(m,
               m);for(i=1,m, for(j=1,i, if(j==i,B[i,j]=j,if(j==1,B[i,j]=(A^2)[i-1,
               1], B[i,j]=(A^2)[i-1,j]));));A=B); return(sum(k=0,n,A[n+1,k+1]))}
%Y A102088 Cf. A102086, A102087.
%Y A102088 Sequence in context: A143921 A082426 A054381 this_sequence A088142 A049370 
               A009343
%Y A102088 Adjacent sequences: A102085 A102086 A102087 this_sequence A102089 A102090 
               A102091
%K A102088 nonn
%O A102088 0,2
%A A102088 Paul D. Hanna (pauldhanna(AT)juno.com), Dec 29 2004

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