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A177284 as a simple table

na(n)
01
11
26
390
42520
541580
6516180
76068622
876331906
9958679970
1011679900408
11138047313960
121610654864328
1318649754961744
14214256589488616
152439692058769566
1627562317214408488
17309367132582535226
183453299423388485028
1938354816922190327314
20424048220090513056908

[1,1,6,90,2520,41580,516180,6068622,76331906,
 958679970,11679900408,138047313960,1610654864328,
 18649754961744,214256589488616,2439692058769566,
 27562317214408488,309367132582535226,
 3453299423388485028,38354816922190327314,
 424048220090513056908]