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A121353
An
A053984
-like Bessel-Binet recursion found by Bob Hanlon's new survey program: a[n] = (3*n - 2)*a[n - 1] - a[n - 2].
+0
1
0, 1, 4, 27, 266, 3431, 54630, 1034539, 22705228, 566596161, 15841987280, 490535009519, 16662348336366, 616016353436023, 24623991789104554, 1058215630578059799, 48653295014801646200, 2382953240094702604001
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 3 22:15 EST 2009. Contains 170310 sequences.
AT&T Labs Research
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