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A305581 as a simple table

na(n)
14
23
36
48
519
633
760
8112
9205
10377
11694
121276
132347
144317
157940
1614604
1726861
1849405
1990870
20167136
21307411
22565417
231039964
241912792
253518173
266470929
2711901894
2821890996
2940263819
3074056709
31136211524
32250532052
33460800285
34847543861

[4,3,6,8,19,33,60,112,205,377,694,1276,2347,4317,
 7940,14604,26861,49405,90870,167136,307411,565417,
 1039964,1912792,3518173,6470929,11901894,21890996,
 40263819,74056709,136211524,250532052,460800285,
 847543861]