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A083583 as a simple table

na(n)
01
18
224
372
4216
5648
61944
75832
817496
952488
10157464
11472392
121417176
134251528
1412754584
1538263752
16114791256
17344373768
181033121304
193099363912
209298091736
2127894275208
2283682825624
23251048476872
24753145430616
252259436291848

[1,8,24,72,216,648,1944,5832,17496,52488,157464,
 472392,1417176,4251528,12754584,38263752,
 114791256,344373768,1033121304,3099363912,
 9298091736,27894275208,83682825624,251048476872,
 753145430616,2259436291848]