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A321952 as a simple table

na(n)
71
821
9231
101792
1111067
1258044
13268940
141129999
154385136
1615928948
1754711958
18179090772
19562156203
201700628930
214978677738
2214153099499
2339180254316
24105881154624
25279906223856
26725158329175
271844006226090
284608929551309
2911336379967178
3027469729015029

[1,21,231,1792,11067,58044,268940,1129999,4385136,
 15928948,54711958,179090772,562156203,1700628930,
 4978677738,14153099499,39180254316,105881154624,
 279906223856,725158329175,1844006226090,
 4608929551309,11336379967178,27469729015029]