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A163315 as a simple table

na(n)
01
14
212
336
4108
5318
6936
72760
88136
923976
1070662
11208260
12613788
131808964
145331420
1515712878
1646309320
17136483800
18402247944
191185513624
203493970742
2110297504260
2230349021740
2389445276900
24263615006412
25776931706398

[1,4,12,36,108,318,936,2760,8136,23976,70662,
 208260,613788,1808964,5331420,15712878,46309320,
 136483800,402247944,1185513624,3493970742,
 10297504260,30349021740,89445276900,263615006412,
 776931706398]