A050258
formatted as a simple table:
n
a(n)
1
1
2
2
3
5
4
12
5
38
6
166
7
899
8
4768
9
28388
10
180529
11
1209318
12
8398278
13
60070590
14
441296836
15
3314576487
[1,2,5,12,38,166,899,4768,28388,180529,1209318, 8398278,60070590,441296836,3314576487]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 5 23:38 EST 2009. Contains 170428 sequences.
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