A006762
formatted as a simple table:
n
a(n)
1
0
2
0
3
4
4
17
5
61
6
214
7
758
8
2723
9
9908
10
36444
11
135266
12
505859
13
1903888
14
7204872
15
27394664
16
104592935
17
400795842
[0,0,4,17,61,214,758,2723,9908,36444,135266, 505859,1903888,7204872,27394664,104592935, 400795842]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 2 11:54 EST 2009. Contains 167921 sequences.
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