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A047921 as a simple table

na(n)
01
11
22
35
41
521
62
71
8106
911
102
111
12643
1362
1412
152
161
174547
18406
1971
2013
212
221
2336696
243046
25481
2680
2714
282
291
30332769
3125737
323708
33559
3489
3515
362
371
383349507
39242094
4032028
414414
42640
4398
4416
452
461
4737054436
482510733
49306723
5038893
515164
52724
53107
5417
552
561

[1,1,2,5,1,21,2,1,106,11,2,1,643,62,12,2,1,4547,
 406,71,13,2,1,36696,3046,481,80,14,2,1,332769,
 25737,3708,559,89,15,2,1,3349507,242094,32028,
 4414,640,98,16,2,1,37054436,2510733,306723,38893,
 5164,724,107,17,2,1]