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A004113 as a simple table

na(n)
11
22
36
418
560
6204
7734
82694
910162
1038982
11151920
12599244
132389028
149608668
1538945230
16158904230
17652178206
182690598570
1911151718166
2046412717826
21193891596436
22812748036380
233417407089470
2414410094628558
2560920843101858
26258169745573158
271096494947168142

[1,2,6,18,60,204,734,2694,10162,38982,151920,
 599244,2389028,9608668,38945230,158904230,
 652178206,2690598570,11151718166,46412717826,
 193891596436,812748036380,3417407089470,
 14410094628558,60920843101858,258169745573158,
 1096494947168142]