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A074060 as a simple table

na(n)
31
41
51
61
75
81
91
1016
1116
121
131
1442
15127
1642
171
181
1999
20715
21715
2299
231
241
25219
263292
277723
283292
29219
301
311
32466
3313333
3463173
3563173
3613333
37466
381
391
40968
4149556
42429594
43861235
44429594
4549556
46968
471
481
491981
50173570
512567940
529300303
539300303
542567940
55173570
561981
571

[1,1,1,1,5,1,1,16,16,1,1,42,127,42,1,1,99,715,715,
 99,1,1,219,3292,7723,3292,219,1,1,466,13333,63173,
 63173,13333,466,1,1,968,49556,429594,861235,
 429594,49556,968,1,1,1981,173570,2567940,9300303,
 9300303,2567940,173570,1981,1]