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A207971 as a simple table

n a(n)
0 1
1 5
2 15
3 140
4 8795
5 9808325
6 57315191130
7 2812698182891585
8 894119494320160426760
9 2048089587570930007354766745
10 32079229816919862900907520464756250
11 3500720882833094608324749707338857577696205
12 2633228648869966875007549667526201212159637714889015

[1,5,15,140,8795,9808325,57315191130,
 2812698182891585,894119494320160426760,
 2048089587570930007354766745,
 32079229816919862900907520464756250,
 3500720882833094608324749707338857577696205,
 26332286488699668750075496675262012121596377148890\
 15]

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Last modified January 20 05:18 EST 2020. Contains 331067 sequences. (Running on oeis4.)