A007760
formatted as a simple table:
n
a(n)
0
1
1
2
2
168
3
17792748
4
75241806496951632
[1,2,168,17792748,75241806496951632]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 11 12:57 EST 2009. Contains 170656 sequences.
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