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A077123 Let M_n be the n X n matrix M_(i,j) = i!-j! then the characteristic polynomial of M_n = x^n+a(n)*x^(n-2). 0
0, 1, 42, 1379, 51676, 2438373, 146581550, 11075609047, 1032628339584, 116710488322601, 15741160102417618, 2499106917666707835, 461526692949421538852, 98124338524653370059469 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..14.

PROG

(PARI) a(n)=polcoeff(charpoly(matrix(n, n, i, j, i!-j!)), n-2)

(PARI) a(n)=sum(i=1, n, sum(j=1, i-1, (i!-j!)^2))

CROSSREFS

Sequence in context: A075922 A230939 A238537 * A121974 A096048 A215301

Adjacent sequences:  A077120 A077121 A077122 * A077124 A077125 A077126

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Nov 29 2002

STATUS

approved

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Last modified June 25 22:23 EDT 2019. Contains 324359 sequences. (Running on oeis4.)