A140804
formatted as a simple table:
n
a(n)
1
1
2
4
3
26
4
120
5
251
6
471
7
637
8
1559
9
2844
10
5906
11
7829
12
7890
[1,4,26,120,251,471,637,1559,2844,5906,7829,7890]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
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