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A189286 as a simple table

n a(n)
0 -1
1 40
2 696
3 23408
4 969496
5 44602560
6 2187147600
7 111957721920
8 5911097451480
9 319469892415808
10 17584481176101952
11 982222958294603040
12 55530668360895219728
13 3171318959654377396864
14 182670436050532943578560
15 10599737781026193970325760
16 619014530633087163062727000
17 36353266320338484003053582400
18 2145559172529803104937217263040
19 127190916635938933740168015020160

[-1,40,696,23408,969496,44602560,2187147600,
 111957721920,5911097451480,319469892415808,
 17584481176101952,982222958294603040,
 55530668360895219728,3171318959654377396864,
 182670436050532943578560,
 10599737781026193970325760,
 619014530633087163062727000,
 36353266320338484003053582400,
 2145559172529803104937217263040,
 127190916635938933740168015020160]

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Last modified September 25 11:03 EDT 2021. Contains 347654 sequences. (Running on oeis4.)