login

A001997 as a simple table

na(n)
01
11
22
34
410
524
666
7176
8493
91362
103821
1110660
1229864
1383329
14232702
15648182
161804901
175015725
1813931755
1938635673
20107090666
21296449133
22820271143
232267225157
246264244414
2517291930470

[1,1,2,4,10,24,66,176,493,1362,3821,10660,29864,
 83329,232702,648182,1804901,5015725,13931755,
 38635673,107090666,296449133,820271143,2267225157,
 6264244414,17291930470]