登录

A350971型作为一个简单的表

n个a(n)
00
10
22
6
440
5180
61232
77266
856320
9408360
103610112
1130974526
12309836800
133065784540
1434342971392
15384653685786
164778192404480
1759724464976720
18815553380483072
1911249503075325046
20167586815066767360
212527964965265232900
2240815105402865713152
23668249973079223076306
2411626293107260590653440
25205304046476194041001080

[0,0,2,6,40,180,1232,7266,56320,408360,3610112,30974526,309836800,3065784540,34342971392,384653685786,4778192404480,59724464976720,815553380483072,11249503075325046,167586815066767360,2527964965265232900,40815105402865713152,668249973079223076306,11626293107260590653440,205304046476194041001080]