A091635
formatted as a simple table:
n
a(n)
1
4
2
17
3
101
4
670
5
4675
6
34425
7
262549
8
2051466
9
16312743
10
131464721
11
1071368863
12
8809580516
[4,17,101,670,4675,34425,262549,2051466,16312743, 131464721,1071368863,8809580516]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 27 14:50 EST 2009. Contains 167570 sequences.
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