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A001559
a(0) = 1, a(1) = 4; thereafter a(n) * (2*n + 10) - a(n-1) * (11*n + 35) + a(n-2) * (8*n + 2) + a(n-3) * (15*n + 7) + a(n-4) * (4*n - 2) = 0.
(Formerly M3497 N1418)
+0
3
1, 4, 15, 54, 193, 690, 2476, 8928, 32358, 117866, 431381, 1585842, 5853849, 21690378, 80650536, 300845232, 1125555054, 4222603968, 15881652606, 59873283372, 226214536506, 856431978324, 3248562071800, 12344168149224
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.
AT&T Labs Research
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