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A306521 as a simple table

na(n)
23
33
44
528
642
7104
8136
9329
10510
11856
121449
132212
142782
153434
164188
175042
186001
197082
208276
219604
2211062
2312666
2414405
2531651
2635694
2740061
2866427
2973966
30108764
31149756
32197516
33288280
34354924
35515538
36701002
37963687
381318399
391840377

[3,3,4,28,42,104,136,329,510,856,1449,2212,2782,
 3434,4188,5042,6001,7082,8276,9604,11062,12666,
 14405,31651,35694,40061,66427,73966,108764,149756,
 197516,288280,354924,515538,701002,963687,1318399,
 1840377]