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A066380 as a simple table

na(n)
01
14
222
3130
4794
54944
631180
7198440
81271626
98192524
1053009102
11344212906
122241812648
1314637774688
1495786202688
15628002401520
164124304597834
1727126202533252
18178651732923346
191178005033926998
207776048412324714

[1,4,22,130,794,4944,31180,198440,1271626,8192524,
 53009102,344212906,2241812648,14637774688,
 95786202688,628002401520,4124304597834,
 27126202533252,178651732923346,1178005033926998,
 7776048412324714]