A055603
formatted as a simple table:
n
a(n)
1
0
2
1
3
90
4
2248
5
43000
6
755100
7
13003620
8
226262400
9
4037765760
10
74481120000
[0,1,90,2248,43000,755100,13003620,226262400, 4037765760,74481120000]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 3 22:15 EST 2009. Contains 170310 sequences.
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