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A117694
(n^n + n)/2.
+0
1
1, 3, 15, 130, 1565, 23331, 411775, 8388612, 193710249, 5000000005, 142655835311, 4458050224134, 151437553296133, 5556003412779015, 218946945190429695, 9223372036854775816, 413620130943168382097, 19673204037648268787721
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.
AT&T Labs Research
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