A101930
formatted as a simple table:
n
a(n)
1
2
2
52
3
881
4
12471
5
161436
6
1980642
7
23471475
8
271360653
9
3080075432
[2,52,881,12471,161436,1980642,23471475,271360653, 3080075432]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 25 20:09 EST 2009. Contains 167514 sequences.
AT&T Labs Research
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