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A001497 as a simple table

n a(n)
0 1
1 1
2 1
3 3
4 3
5 1
6 15
7 15
8 6
9 1
10 105
11 105
12 45
13 10
14 1
15 945
16 945
17 420
18 105
19 15
20 1
21 10395
22 10395
23 4725
24 1260
25 210
26 21
27 1
28 135135
29 135135
30 62370
31 17325
32 3150
33 378
34 28
35 1
36 2027025
37 2027025
38 945945
39 270270
40 51975
41 6930
42 630
43 36
44 1
45 34459425
46 34459425
47 16216200
48 4729725
49 945945
50 135135
51 13860
52 990
53 45
54 1

[1,1,1,3,3,1,15,15,6,1,105,105,45,10,1,945,945,
 420,105,15,1,10395,10395,4725,1260,210,21,1,
 135135,135135,62370,17325,3150,378,28,1,2027025,
 2027025,945945,270270,51975,6930,630,36,1,
 34459425,34459425,16216200,4729725,945945,135135,
 13860,990,45,1]

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Last modified March 28 16:34 EDT 2024. Contains 371254 sequences. (Running on oeis4.)