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A338355 as a simple table

na(n)
11
21
31
42
53
66
711
823
947
10105
11231
12532
131254
142872
156739
1615955
1737776
1889779
19213381
20507949
211209184
222880382
236861351
2416348887
2538955354

[1,1,1,2,3,6,11,23,47,105,231,532,1254,2872,6739,
 15955,37776,89779,213381,507949,1209184,2880382,
 6861351,16348887,38955354]