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Search: id:A071543
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| A071543 |
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a(n) = det M_n where M_n is the n X n matrix m(i,j) = prime(i+j); a(0) = 1 by convention. |
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+0
2
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| 1, 3, -4, 12, 144, 576, -7104, 45248, 450432, 2240512, 5292544, -88076288, -62210048, 391122944, -1489174528, -165174853632, 2565388042240, -28667557511168, -1065163492556800, -14206520416796672, -115544734381899776, 5968167755906547712, -258278630548029046784
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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a(n) is a square for n=2,4 and 5. Are there any other values?
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PROGRAM
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(PARI) for(n=1, 30, print1(matdet(matrix(n, n, i, j, prime(i+j))), ", "))
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CROSSREFS
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Sequence in context: A127689 A127690 A092417 this_sequence A127611 A082197 A138101
Adjacent sequences: A071540 A071541 A071542 this_sequence A071544 A071545 A071546
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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 30 2002
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EXTENSIONS
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Edited by N. J. A. Sloane (njas(AT)research.att.com), Sep 18 2008 at the suggestion of R. J. Mathar.
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