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A131893 as a simple table

n a(n)
0 1
1 1
2 7
3 21
4 35
5 35
6 21
7 7
8 1
9 49
10 1029
11 12005
12 84035
13 352947
14 823543
15 823543
16 17294403
17 155649627
18 778248135
19 2334744405
20 4202539929
21 4202539929
22 1801088541
23 21012699645
24 105063498225
25 291843050625
26 486405084375
27 486405084375
28 270225046875
29 64339296875

[1,1,7,21,35,35,21,7,1,49,1029,12005,84035,352947,
 823543,823543,17294403,155649627,778248135,
 2334744405,4202539929,4202539929,1801088541,
 21012699645,105063498225,291843050625,
 486405084375,486405084375,270225046875,
 64339296875]

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Last modified August 21 06:54 EDT 2019. Contains 326162 sequences. (Running on oeis4.)