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A206405 as a simple table

na(n)
11
23
320
4218
53414
670306
71789850
854071216
91886496960
1074588759664
113295393803888
12160898970043632
138603780292835896
14500078481148348176
1531391957137745933088
162116613399519305596384
17152558384742741641353056
1811705479592386152200155200

[1,3,20,218,3414,70306,1789850,54071216,
 1886496960,74588759664,3295393803888,
 160898970043632,8603780292835896,
 500078481148348176,31391957137745933088,
 2116613399519305596384,152558384742741641353056,
 11705479592386152200155200]