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A346647 as a simple table

na(n)
01
12
28
354
4460
54361
643988
7462580
85014252
955624944
10628432101
117205500484
1283632219892
13980710882430
1411601345881748
15138278231052451
161659037424218780
1720020306637339944
18242835190201382648
192958961154058610552
2036203518795424475661

[1,2,8,54,460,4361,43988,462580,5014252,55624944,
 628432101,7205500484,83632219892,980710882430,
 11601345881748,138278231052451,1659037424218780,
 20020306637339944,242835190201382648,
 2958961154058610552,36203518795424475661]