A176874 - OEIS

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A176874 as a simple table

n	a(n)
3	0
4	5
5	23
6	62
7	62
8	723
9	1578
10	1578
11	8139
12	39644
13	94323
14	94323
15	1317783
16	1680515
17	2025699
18	3205598
19	23003999
20	113333163
21	170717819
22	1710518799
23	3608109348
24	16655876439
25	24090452279

[0,5,23,62,62,723,1578,1578,8139,39644,94323, 94323,1317783,1680515,2025699,3205598,23003999, 113333163,170717819,1710518799,3608109348, 16655876439,24090452279]