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Search: id:A059383
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| 1, 15, 1200, 288000, 179712000, 215654400000, 517570560000000, 1987470950400000000, 12878811758592000000000, 120545678060421120000000000, 1764788726804565196800000000000, 33883943554647651778560000000000000, 967725427920736934795673600000000000000
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OFFSET
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1,2
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COMMENT
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a(n) is also the determinant of the symmetric n X n matrix M defined by M(i,j) = gcd(i,j)^4 for 1 <= i,j <= n - Avi Peretz (njk(AT)netvision.net.il), Mar 22 2001
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REFERENCES
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L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 203, #17.
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CROSSREFS
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Cf. A001088.
Sequence in context: A090213 A027492 A001728 this_sequence A098723 A120296 A135810
Adjacent sequences: A059380 A059381 A059382 this_sequence A059384 A059385 A059386
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jan 28 2001
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