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A152801
a(n) =
A152800
(n+1,2n) for n>=0.
+0
3
1, 2, 5, 21, 87, 378, 1682, 7596, 34688, 159724, 740243, 3448579, 16134813, 75760294, 356811308, 1684882778, 7974184903, 37815280813, 179644013528, 854749753320, 4072634928710, 19429522879905, 92799859650401
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Maintained by
N. J. A. Sloane
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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.
AT&T Labs Research
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