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A157550 as a simple table

na(n)
21
33
454
51830
668175
72604105
872741487
91575681348
1032584952460
11663445574880
1213119864945495
13250743317040879
144601891725568592
1580821202263252920
161358608769903073690
1721985893765384549032
18344851090651019364715

[1,3,54,1830,68175,2604105,72741487,1575681348,
 32584952460,663445574880,13119864945495,
 250743317040879,4601891725568592,
 80821202263252920,1358608769903073690,
 21985893765384549032,344851090651019364715]