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A101658
a(n)=Product{k=0..n, 1+3^
A101650
(k)}/2.
+0
1
1, 2, 8, 16, 160, 640, 6400, 12800, 25600, 256000, 1024000, 4096000, 16384000, 163840000, 327680000, 655360000, 2621440000, 5242880000, 10485760000, 104857600000, 419430400000, 1677721600000, 3355443200000, 13421772800000
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
AT&T Labs Research
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