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A027238 as a simple table

na(n)
01
11
22
34
47
517
631
776
8156
9352
10784
111674
123962
138129
1420173
1543193
16103522
17230536
18535294
191231484
202787700
216591350
2214613710
2335369380
2477886902
25190329098
26428113940
271027180798
282353823912
295559635866
3012950837432

[1,1,2,4,7,17,31,76,156,352,784,1674,3962,8129,
 20173,43193,103522,230536,535294,1231484,2787700,
 6591350,14613710,35369380,77886902,190329098,
 428113940,1027180798,2353823912,5559635866,
 12950837432]