A001206
formatted as a simple table:
n
a(n)
0
0
1
1
2
2
3
4
4
12
5
81
6
2646
7
1422564
8
229809982112
[0,1,2,4,12,81,2646,1422564,229809982112]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 9 18:50 EST 2009. Contains 170568 sequences.
AT&T Labs Research
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