A102088 - OEIS

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A102088

Row sums of triangular matrix A102086, which shifts upward to exclude the main diagonal under matrix square.

1, 3, 10, 49, 367, 3850, 52173, 868614, 17199370, 395757887, 10396896795, 307511681367, 10124396776169, 367567456615441, 14598938725992903, 630060602243145513, 29375322688053255480, 1472008290120323375502 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	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^2)[i-1, 1], B[i, j]=(A^2)[i-1, j])); )); A=B); return(sum(k=0, n, A[n+1, k+1]))}`
	CROSSREFS	`Cf. A102086, A102087.` `Sequence in context: A143921 A082426 A054381 * A088142 A049370 A009343` `Adjacent sequences: A102085 A102086 A102087 * A102089 A102090 A102091`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna (pauldhanna(AT)juno.com), Dec 29 2004`

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Last modified February 14 10:43 EST 2012. Contains 205614 sequences.