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Search: id:A071409
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| A071409 |
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Determinant of the n X n matrix m(i,j)=i^j+j^i. |
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+0
1
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| 2, 7, 80, 2692, -188160, 673763328, 53114341552128, 11442355482580107264, 101868843539003372580372480, -11188458083483956358422238173593600, 39367352051951445285669984261580278202368000
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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If n==0 mod 5 a(n) < 0
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PROGRAM
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(PARI) for(n=1, 20, print1(matdet(matrix(n, n, i, j, i^j+j^i)), ", "))
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CROSSREFS
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Sequence in context: A059406 A042791 A128293 this_sequence A135756 A111822 A062764
Adjacent sequences: A071406 A071407 A071408 this_sequence A071410 A071411 A071412
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KEYWORD
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easy,sign
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), May 28 2002
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