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A199698 as a simple table

na(n)
11
24
314
452
5200
6708
72642
810000
937984
10144876
11554120
122128672
138204180
1431697564
15122734614
16476170124
171850664202
187204005752
1928081918548
20109604285492
21428278469018
221675246478864
236559126501510
2425703606447364

[1,4,14,52,200,708,2642,10000,37984,144876,554120,
 2128672,8204180,31697564,122734614,476170124,
 1850664202,7204005752,28081918548,109604285492,
 428278469018,1675246478864,6559126501510,
 25703606447364]