A006961
formatted as a simple table:
n
a(n)
0
1
1
1
2
3
3
6
4
15
5
31
6
75
7
164
8
388
9
887
10
2092
11
4884
12
11599
13
27443
14
65509
15
156427
16
375263
[1,1,3,6,15,31,75,164,388,887,2092,4884,11599, 27443,65509,156427,375263]
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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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