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A151830 as a simple table

na(n)
11
24
328
4234
52162
621272
7218740
82323730
925314097
10281345096
113178474308
1236400646766
13421693622520
144933625049464
1558216226287844
16692095652493483

[1,4,28,234,2162,21272,218740,2323730,25314097,
 281345096,3178474308,36400646766,421693622520,
 4933625049464,58216226287844,692095652493483]