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A026305 as a simple table

na(n)
11
24
320
4104
5560
63080
717199
897120
9553146
103171860
1118288127
12105922544
13615820400
143591858480
1521008159700
16123169357728
17723659556026
184259672761560
1925115352874780
20148302374872080
21876876653336922
225191051724957736

[1,4,20,104,560,3080,17199,97120,553146,3171860,
 18288127,105922544,615820400,3591858480,
 21008159700,123169357728,723659556026,
 4259672761560,25115352874780,148302374872080,
 876876653336922,5191051724957736]