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A002974 as a simple table

na(n)
11
21
34
47
511
620
735
859
999
10165
11270
12443
13723
141161
151861
162961
174654
187279
1911317
2017476
2126879
2241132
2362601
2494878
25143172
26215115
27321995
28480216
29713655
301057192

[1,1,4,7,11,20,35,59,99,165,270,443,723,1161,1861,
 2961,4654,7279,11317,17476,26879,41132,62601,
 94878,143172,215115,321995,480216,713655,1057192]