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A038056 as a simple table

na(n)
12
23
36
418
554
6189
7700
82778
911486
1049377
11217936
12984818
134533004
1421198962
15100471862
16481754806
172333465628
1811404047817
1956177574628
20278710061814
211391617108600
226988781174376
2335283390923324
24178990052273558
25912019786448570
264665994686718118

[2,3,6,18,54,189,700,2778,11486,49377,217936,
 984818,4533004,21198962,100471862,481754806,
 2333465628,11404047817,56177574628,278710061814,
 1391617108600,6988781174376,35283390923324,
 178990052273558,912019786448570,4665994686718118]