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A215930 as a simple table

na(n)
01
11
22
34
48
516
634
771
8154
9341
10768
111765
124134
139838
1423766
1558226
16144353
17361899
18916152
192339912
206023447
2115617254
2240752401
23106967331
24282267774
25748500921
261993727506
275332497586
2814316894271
2938574473086
30104273776038
31282733466684
32768809041078

[1,1,2,4,8,16,34,71,154,341,768,1765,4134,9838,
 23766,58226,144353,361899,916152,2339912,6023447,
 15617254,40752401,106967331,282267774,748500921,
 1993727506,5332497586,14316894271,38574473086,
 104273776038,282733466684,768809041078]