A063528 - OEIS

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A063528 as a simple table

n	a(n)
1	2
2	8
3	80
4	80
5	1215
6	16767
7	76544
8	636416
9	3995648
10	24151040
11	36315135
12	689278976
13	1487503359
14	1487503359
15	155240824832
16	785129144319
17	4857090670592
18	45922887663615
19	157197025673216
20	1375916505694208

[2,8,80,80,1215,16767,76544,636416,3995648, 24151040,36315135,689278976,1487503359,1487503359, 155240824832,785129144319,4857090670592, 45922887663615,157197025673216,1375916505694208]