A055545
formatted as a simple table:
n
a(n)
0
1
1
2
2
4
3
8
4
17
5
38
6
98
7
306
8
1724
9
383172
[1,2,4,8,17,38,98,306,1724,383172]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 7 08:40 EST 2009. Contains 170430 sequences.
AT&T Labs Research
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