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A149837 as a simple table

na(n)
01
12
24
312
436
5100
6324
71052
83228
910852
1036532
11117676
12404364
131390516
144610980
1516077660
1656078812
17189603652
18668095892
192354323852
208071935148
2128669742292
22101819683204
23352800887100
241260929362940
254505714683748
2615742066776692
2756548206097260
28203073342063308
29714263158415348
302576510962881380

[1,2,4,12,36,100,324,1052,3228,10852,36532,117676,
 404364,1390516,4610980,16077660,56078812,
 189603652,668095892,2354323852,8071935148,
 28669742292,101819683204,352800887100,
 1260929362940,4505714683748,15742066776692,
 56548206097260,203073342063308,714263158415348,
 2576510962881380]