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Search: id:A077123
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| A077123 |
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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). |
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+0
1
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| 0, 1, 42, 1379, 51676, 2438373, 146581550, 11075609047, 1032628339584, 116710488322601, 15741160102417618, 2499106917666707835, 461526692949421538852, 98124338524653370059469
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OFFSET
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1,3
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PROGRAM
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(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))
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CROSSREFS
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Sequence in context: A001778 A111780 A075922 this_sequence A121974 A096048 A067638
Adjacent sequences: A077120 A077121 A077122 this_sequence A077124 A077125 A077126
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KEYWORD
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nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Nov 29 2002
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