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A111567 as a simple table

na(n)
01
15
218
362
4212
5724
62472
78440
828816
998384
10335904
111146848
123915584
1313368640
1445643392
15155836288
16532058368
171816560896
186202126848
1921175385600
2072297288704
21246838383616
22842758957056
232877359060992

[1,5,18,62,212,724,2472,8440,28816,98384,335904,
 1146848,3915584,13368640,45643392,155836288,
 532058368,1816560896,6202126848,21175385600,
 72297288704,246838383616,842758957056,
 2877359060992]