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A199812 as a simple table

na(n)
11
21
32
45
513
632
779
8193
9478
101196
113037
127802
1320287
1453259
15141069
16376449
171011295
182732453
197421128
2020247355

[1,1,2,5,13,32,79,193,478,1196,3037,7802,20287,
 53259,141069,376449,1011295,2732453,7421128,
 20247355]