A140177
formatted as a simple table:
n
a(n)
1
1
2
4
3
25
4
171
5
1024
6
5452
7
27319
8
133343
9
650240
10
3183136
11
15730003
12
78792479
13
401274724
[1,4,25,171,1024,5452,27319,133343,650240,3183136, 15730003,78792479,401274724]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 1 19:22 EST 2009. Contains 167811 sequences.
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