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A144316 as a simple table

na(n)
11
21
34
416
570
6280
71168
84672
918884
1075632
11303368
121213472
134858064
1419432256
1577743040
16310975520
171243959873
184975839492
1919903598208
2079614392832
21318458493192
221273834028832
235095339755744
2420381359022976
2581525450936496
26326101803775384

[1,1,4,16,70,280,1168,4672,18884,75632,303368,
 1213472,4858064,19432256,77743040,310975520,
 1243959873,4975839492,19903598208,79614392832,
 318458493192,1273834028832,5095339755744,
 20381359022976,81525450936496,326101803775384]