login

A147730 as a simple table

na(n)
11
22
36
416
554
6232
7936
83880
917302
1081584
11409012
122138674
1311754832
1466857094
15395646912
162409911234
1715175510148

[1,2,6,16,54,232,936,3880,17302,81584,409012,
 2138674,11754832,66857094,395646912,2409911234,
 15175510148]