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A022074 formatted as a simple table:

n a(n)
0 1
1 0
2 0
3 0
4 42
5 0
6 0
7 0
8 840
9 0
10 0
11 0
12 10640
13 0
14 0
15 0
16 95802
17 0
18 0
19 0
20 652848
21 2097152
22 0
23 0
24 3504816
25 0
26 0
27 0
28 15266880
29 44040192
30 0
31 0
32 55350120
33 0
34 0
35 0
36 171361498
37 440401920
38 0
39 0
40 465944304
41 0
42 0
43 0
44 1145653488

[1,0,0,0,42,0,0,0,840,0,0,0,10640,0,0,0,95802,0,0,
 0,652848,2097152,0,0,3504816,0,0,0,15266880,
 44040192,0,0,55350120,0,0,0,171361498,440401920,0,
 0,465944304,0,0,0,1145653488]

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.


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