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URL: https://oeis.org/A071543

⇱ A071543 - OEIS

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A071543
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.
4
1, 3, -4, 12, 144, 576, -7104, 45248, 450432, 2240512, 5292544, -88076288, -62210048, 391122944, -1489174528, -165174853632, 2565388042240, -28667557511168, -1065163492556800, -14206520416796672, -115544734381899776, 5968167755906547712, -258278630548029046784
OFFSET
0,2
COMMENTS
a(n) is a square for n=2,4 and 5. Are there any other values?
PROG
(PARI) for(n=1, 30, print1(matdet(matrix(n, n, i, j, prime(i+j))), ", "))
CROSSREFS
Sequence in context: A330068 A127690 A092417 * A242648 A327583 A324159
KEYWORD
easy,sign
AUTHOR
Benoit Cloitre, May 30 2002
EXTENSIONS
Edited by N. J. A. Sloane, Sep 18 2008 at the suggestion of R. J. Mathar.
STATUS
approved