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A224992 as a simple table

na(n)
01
13
218
3144
41368
514400
6160992
71861632
821919104
9260508672
103110985216
1137241118720
12446349219840
135352925446144
1464215514275840
15770468624990208
169244918222258176
17110934787001942016
181331192054033547264
1915974152308466384896
20191688913661984243712

[1,3,18,144,1368,14400,160992,1861632,21919104,
 260508672,3110985216,37241118720,446349219840,
 5352925446144,64215514275840,770468624990208,
 9244918222258176,110934787001942016,
 1331192054033547264,15974152308466384896,
 191688913661984243712]