login

A216834 as a simple table

na(n)
10
20
30
40
51
60
70
80
92
106
1131
12155
131297
1412517
15139854
161764950
1725286953
18404899916

[0,0,0,0,1,0,0,0,2,6,31,155,1297,12517,139854,
 1764950,25286953,404899916]