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A184688 as a simple table

na(n)
19
2192
34080
486688
51841856
639133824
7831474432
817666296320
9375354928128
107975147677696
11169447570059264
123600244178460672
1376494210805186560
141625268730858733568
1534532004706009153536
16733699803838461640704

[9,192,4080,86688,1841856,39133824,831474432,
 17666296320,375354928128,7975147677696,
 169447570059264,3600244178460672,
 76494210805186560,1625268730858733568,
 34532004706009153536,733699803838461640704]