login

A066143 as a simple table

na(n)
01
13
28
318
444
5150
6762
75096
840392
9362970
103628910
1139916932
12479001756
136227020982
1487178291410
151307674368240
1620922789888272
17355687428096306
186402373705728342
19121645100408832380
202432902008176640420
2151090942171709440462
221124000727777607680506

[1,3,8,18,44,150,762,5096,40392,362970,3628910,
 39916932,479001756,6227020982,87178291410,
 1307674368240,20922789888272,355687428096306,
 6402373705728342,121645100408832380,
 2432902008176640420,51090942171709440462,
 1124000727777607680506]