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A277248 as a simple table

na(n)
11
22
36
424
5108
6528
72724
814616
980760
10456552
112628504
1215360216
1390879096
14543336912
153277586136
1619924733088
17121943223576
18750756116376
194646484480552
2028892787031008
21180420486241776
221130930538186360
237113550964713848
2444885329202906448

[1,2,6,24,108,528,2724,14616,80760,456552,2628504,
 15360216,90879096,543336912,3277586136,
 19924733088,121943223576,750756116376,
 4646484480552,28892787031008,180420486241776,
 1130930538186360,7113550964713848,
 44885329202906448]