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Search: id:A069642
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| A069642 |
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Let M_n be the n X n matrix with M_n(i,j)=1/(i+j+3); then a(n)=1/det(M_n). |
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| 5, 1260, 8890560, 1408264704000, 4485780768268800000, 269685408935166352128000000, 294004853789028834558485643264000000, 5657409727323500620299434201290024943616000000
(list; graph; listen)
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OFFSET
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1,1
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PROGRAM
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(PARI) for(n=1, 10, print1(1/matdet(matrix(n, n, i, j, 1/(i+j+3))), ", "))
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CROSSREFS
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Adjacent sequences: A069639 A069640 A069641 this_sequence A069643 A069644 A069645
Sequence in context: A004805 A123266 A034864 this_sequence A066162 A096725 A062598
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KEYWORD
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easy,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 21 2002
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