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 A102100 Row sums of triangular matrix A102098, which shifts upward to exclude the main diagonal under matrix cube. 2
 1, 3, 18, 322, 12979, 924628, 103158338, 16710522378, 3724631345923, 1097090407192683, 413803244841678483, 194887616017161359389, 112265654949194591311618, 77751843768367000711311005 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS PROG (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^3)[i-1, 1], B[i, j]=(A^3)[i-1, j])); )); A=B); return(sum(k=0, n, A[n+1, k+1]))} CROSSREFS Cf. A102098, A102099. Sequence in context: A299431 A222790 A128775 * A083000 A303074 A181040 Adjacent sequences:  A102097 A102098 A102099 * A102101 A102102 A102103 KEYWORD nonn AUTHOR Paul D. Hanna, Dec 29 2004 STATUS approved

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Last modified December 16 06:18 EST 2019. Contains 330016 sequences. (Running on oeis4.)