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A071579
a(n) = 2*a(n-1)*
A002812
(n-1)
+0
2
1, 4, 56, 10864, 408855776, 579069776145402304, 1161588808526051807570761628582646656, 4674072680304961790168962360144614650442718636276775741658113370728376064
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 17 19:39 EST 2009. Contains 170821 sequences.
AT&T Labs Research
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