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Search: id:A109493
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| 1, 1, 7, 343, 117649, 282475249, 4747561509943, 558545864083284007, 459986536544739960976801, 2651730845859653471779023381601, 107006904423598033356356300384937784807
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OFFSET
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0,3
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COMMENT
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Sequence given by the Hankel transform (see A001906 for definition) of A081178 = {1, 1, 8, 71, 680, 6882, 72528, 788019, ...}; example : det([1, 1, 8, 71; 1, 8, 71, 680; 8, 71, 680, 6882; 71, 680, 6882, 72528]) = 7^6 = 117649.
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FORMULA
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a(n+1) is the determinant of n X n matrix M_(i, j) = binomial(7i, j).
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MAPLE
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a:=n->mul (7^j, j=1..n): seq(a(n), n=-1..9); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Oct 03 2007
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CROSSREFS
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Cf. A006125, A047656, A053763, A053764, A109345, A109354.
Sequence in context: A054325 A068150 A013712 this_sequence A015479 A142669 A067556
Adjacent sequences: A109490 A109491 A109492 this_sequence A109494 A109495 A109496
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KEYWORD
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nonn
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AUTHOR
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Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Aug 29 2005
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