login

A189874 as a simple table

na(n)
11
20
30
42
510
60
70
84
98
1028
11100
12186
13624
141720
157288
1630666
17100220
18360208
191517804
207302336
2129429672
22139854636
23753288744

[1,0,0,2,10,0,0,4,8,28,100,186,624,1720,7288,
 30666,100220,360208,1517804,7302336,29429672,
 139854636,753288744]