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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A245602 as a simple table

na(n)
0-1
1-3
2-7
3-6
4-15
5-60
6-31
7-390
8-120
9-63
10-2100
11-2520
12-127
13-10206
14-31920
15-5040
16-255
17-46620
18-317520
19-181440
20-511
21-204630
22-2739240
23-3780000
24-362880
25-1023
26-874500
27-21538440
28-59875200
29-19958400
30-2047

[-1,-3,-7,-6,-15,-60,-31,-390,-120,-63,-2100,
 -2520,-127,-10206,-31920,-5040,-255,-46620,
 -317520,-181440,-511,-204630,-2739240,-3780000,
 -362880,-1023,-874500,-21538440,-59875200,
 -19958400,-2047]