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A254721 as a simple table

na(n)
1512
22630
311677
448168
5185287
6689386
72473062
88658471
929751063
10100670841
11336473119
121113296226
133653127707
1411905443852
1538578340182
16124412575639
17399614077574
181279229985977
194083348943956
2013002745584653
2141320382225461

[512,2630,11677,48168,185287,689386,2473062,
 8658471,29751063,100670841,336473119,1113296226,
 3653127707,11905443852,38578340182,124412575639,
 399614077574,1279229985977,4083348943956,
 13002745584653,41320382225461]