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A200781 as a simple table

n a(n)
0 1
1 5
2 25
3 115
4 530
5 2425
6 11100
7 50775
8 232275
9 1062500
10 4860250
11 22232375
12 101698250
13 465201250
14 2127983750
15 9734098125
16 44526969375
17 203681015625
18 931704015625
19 4261920875000
20 19495429065625
21 89178510250000
22 407931862578125
23 1866014626609375
24 8535765175875000
25 39045399804843750
26 178606512071015625
27 817004981729375000

[1,5,25,115,530,2425,11100,50775,232275,1062500,
 4860250,22232375,101698250,465201250,2127983750,
 9734098125,44526969375,203681015625,931704015625,
 4261920875000,19495429065625,89178510250000,
 407931862578125,1866014626609375,8535765175875000,
 39045399804843750,178606512071015625,
 817004981729375000]

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Last modified March 29 06:44 EDT 2024. Contains 371265 sequences. (Running on oeis4.)