A124235 - OEIS

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A124235 as a simple table

n	a(n)
1	1
2	1
3	17
4	877
5	26
6	6827
7	12310607
8	105059
9	604489
10	49568347
11	12933671
12	143562866581
13	2406858923083
14	35714915113
15	530084035699
16	7390807289267
17	1031992153425439
18	225749374968517
19	8052704479475951909

[1,1,17,877,26,6827,12310607,105059,604489, 49568347,12933671,143562866581,2406858923083, 35714915113,530084035699,7390807289267, 1031992153425439,225749374968517, 8052704479475951909]