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A130531 as a simple table

na(n)
01
13
220
3300
47816
5309268
617129124
71257440728
8117670533312
913632858981520
101911496421824368
11318509331241411392
1262137611331237184232
1314017177497096182047312
143617854328162898879096264

[1,3,20,300,7816,309268,17129124,1257440728,
 117670533312,13632858981520,1911496421824368,
 318509331241411392,62137611331237184232,
 14017177497096182047312,3617854328162898879096264]