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A200660 as a simple table

na(n)
10
21
38
449
5284
61658
79974
862375
9406832
102769493
1119668054
12145559632
131121153604
148974604065
1574553168520
16641808575961
175718014325296
1852653303354906
19500515404889978
204905937052293759
2149530189989912312
22514541524981377909
235494885265473192914

[0,1,8,49,284,1658,9974,62375,406832,2769493,
 19668054,145559632,1121153604,8974604065,
 74553168520,641808575961,5718014325296,
 52653303354906,500515404889978,4905937052293759,
 49530189989912312,514541524981377909,
 5494885265473192914]