login

A181950 as a simple table

na(n)
11
21
34
419
591
6571
74096
838599
9370399
103771751
1140020916
12486887611
136457566259
1497397627419
151566407932636
1625622476773391
17416792928270751
187346982309720079
19141863542111338124
202968348473040595971
2165223378275792128771
221460499016109864574691
2332600807940657384926884

[1,1,4,19,91,571,4096,38599,370399,3771751,
 40020916,486887611,6457566259,97397627419,
 1566407932636,25622476773391,416792928270751,
 7346982309720079,141863542111338124,
 2968348473040595971,65223378275792128771,
 1460499016109864574691,32600807940657384926884]