A093970
formatted as a simple table:
n
a(n)
0
1
1
2
2
4
3
6
4
11
5
21
6
31
7
55
8
99
9
145
10
252
11
430
12
620
13
1042
14
1786
15
2597
16
4304
17
7241
18
10374
19
17098
20
28967
[1,2,4,6,11,21,31,55,99,145,252,430,620,1042,1786, 2597,4304,7241,10374,17098,28967]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
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