A109457
formatted as a simple table:
n
a(n)
0
2
1
4
2
16
3
166
4
4170
5
224716
6
24445368
7
5167757614
8
2061662323954
[2,4,16,166,4170,224716,24445368,5167757614, 2061662323954]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 30 13:13 EST 2009. Contains 167758 sequences.
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