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A356837 as a simple table

na(n)
01
120
2260
33212
439470
5484760
65953532
773117640
8897985850
911028509072
10135445355180
111663456422080
1220429547136382
13250903113935780
143081437496506420
1537844317258279532
16464780593592780450
175708148959489987900
1870103969470537620692
19860973771077827270580

[1,20,260,3212,39470,484760,5953532,73117640,
 897985850,11028509072,135445355180,1663456422080,
 20429547136382,250903113935780,3081437496506420,
 37844317258279532,464780593592780450,
 5708148959489987900,70103969470537620692,
 860973771077827270580]