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A001641 as a simple table

na(n)
11
23
34
411
516
630
750
891
9157
10278
11485
12854
131496
142628
154609
168091
1714196
1824915
1943720
2076726
21134642
22236283
23414645
24727654
251276941
262240878
273932464
286900996
2912110401
3021252275
3137295140
3265448411
33114853952
34201554638
35353703730
36620706779

[1,3,4,11,16,30,50,91,157,278,485,854,1496,2628,
 4609,8091,14196,24915,43720,76726,134642,236283,
 414645,727654,1276941,2240878,3932464,6900996,
 12110401,21252275,37295140,65448411,114853952,
 201554638,353703730,620706779]