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A284641 as a simple table

n a(n)
0 1
1 12
2 66
3 220
4 495
5 792
6 924
7 792
8 495
9 232
10 198
11 672
12 1981
13 3960
14 5544
15 5544
16 3960
17 1980
18 726
19 792
20 2982
21 7920
22 13860
23 16632
24 13860
25 7920
26 2970
27 880
28 2046
29 7920
30 18480
31 27720
32 27720
33 18480
34 7920
35 1980
36 727
37 4092
38 14520
39 29700
40 38610
41 33264
42 19404
43 7920
44 2475
45 1584
46 6996
47 22584
48 43560
49 55440
50 49896

[1,12,66,220,495,792,924,792,495,232,198,672,1981,
 3960,5544,5544,3960,1980,726,792,2982,7920,13860,
 16632,13860,7920,2970,880,2046,7920,18480,27720,
 27720,18480,7920,1980,727,4092,14520,29700,38610,
 33264,19404,7920,2475,1584,6996,22584,43560,55440,
 49896]

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Last modified October 21 08:42 EDT 2018. Contains 316405 sequences. (Running on oeis4.)