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A033540 as a simple table

na(n)
11
22
36
421
588
6445
72676
818739
9149920
101349289
1113492900
12148421911
131781062944
1423153818285
15324153456004
164862301840075
1777796829441216
181322546100500689
1923805829809012420
20452310766371235999
219046215327424720000
22189970521875919120021

[1,2,6,21,88,445,2676,18739,149920,1349289,
 13492900,148421911,1781062944,23153818285,
 324153456004,4862301840075,77796829441216,
 1322546100500689,23805829809012420,
 452310766371235999,9046215327424720000,
 189970521875919120021]