A137279
formatted as a simple table:
n
a(n)
1
1
2
4
3
0
4
16
5
40
6
192
7
560
8
3328
9
11772
10
63840
11
259336
12
1550976
13
7169656
14
42410256
15
234044160
16
1366190592
[1,4,0,16,40,192,560,3328,11772,63840,259336, 1550976,7169656,42410256,234044160,1366190592]
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified December 4 15:11 EST 2009. Contains 170347 sequences.
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