login

A375700 as a simple table

na(n)
01
10
20
30
48
520
680
7420
811648
9100800
10912000
119055200
12181547520
132790627840
1441568334080
15635617382400
1613172198645760
17273158953267200
185632405756723200
19117530452124467200
202815021136030515200
2171252240659839590400
221844362570865444044800

[1,0,0,0,8,20,80,420,11648,100800,912000,9055200,
 181547520,2790627840,41568334080,635617382400,
 13172198645760,273158953267200,5632405756723200,
 117530452124467200,2815021136030515200,
 71252240659839590400,1844362570865444044800]