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A102585 Column 0 of triangular matrix A102583, in which row n is formed from the first differences of row (n-1) of its inverse matrix square. 2
1, 1, -2, 13, -209, 7558, -584837, 94047241, -30883147262, 20492965038853, -27310366246742669, 72841632366094705678, -388104936993411191934437, 4126997257143980587638461521, -87552095605182502304219090669762, 3705151846765308253776294449404299133 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..15.

PROG

(PARI) {a(n)=local(A=Mat(1), B); for(m=2, n+1, B=matrix(m, m); for(i=1, m, for(j=1, i, if(j==i, B[i, j]=1, if(j==1, B[i, j]=(A^-2)[i-1, 1], B[i, j]=(A^-2)[i-1, j]-(A^-2)[i-1, j-1])); )); A=B); return(A[n+1, 1])}

CROSSREFS

Cf. A102583, A102586.

Sequence in context: A003085 A053598 A193550 * A227746 A078702 A259795

Adjacent sequences:  A102582 A102583 A102584 * A102586 A102587 A102588

KEYWORD

sign

AUTHOR

Paul D. Hanna, Jan 22 2005

STATUS

approved

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Last modified January 20 04:21 EST 2019. Contains 319323 sequences. (Running on oeis4.)