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A234854 as a simple table

na(n)
11
24
318
496
5624
64896
745072
8474624
95619456
1073903104
111069106688
1216872800256
13288483876864
145311773904896
15104789944829952
162205099306123264
1749302137885884416
181167150882577711104
1929165495002777387008
20767163772371852066816
2121188300138891474632704

[1,4,18,96,624,4896,45072,474624,5619456,73903104,
 1069106688,16872800256,288483876864,5311773904896,
 104789944829952,2205099306123264,
 49302137885884416,1167150882577711104,
 29165495002777387008,767163772371852066816,
 21188300138891474632704]