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A136793 as a simple table

na(n)
14
216
3104
4752
55996
650512
7444256
84027360
937383044
10353486320
113393093696
1232976302800
13323839605124
143208549483216
1532033691247528
16321955764477936
173254812520854980
1833075467402453872
19337670437247448728
203461635652745799136
2135620112071990294784

[4,16,104,752,5996,50512,444256,4027360,37383044,
 353486320,3393093696,32976302800,323839605124,
 3208549483216,32033691247528,321955764477936,
 3254812520854980,33075467402453872,
 337670437247448728,3461635652745799136,
 35620112071990294784]