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A110593 as a simple table

na(n)
13
26
318
454
5162
6486
71458
84374
913122
1039366
11118098
12354294
131062882
143188646
159565938
1628697814
1786093442
18258280326
19774840978
202324522934
216973568802
2220920706406
2362762119218
24188286357654
25564859072962
261694577218886

[3,6,18,54,162,486,1458,4374,13122,39366,118098,
 354294,1062882,3188646,9565938,28697814,86093442,
 258280326,774840978,2324522934,6973568802,
 20920706406,62762119218,188286357654,564859072962,
 1694577218886]