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A037728 as a simple table

na(n)
12
218
3165
41486
513376
6120384
71083459
89751132
987760190
10789841710
117108575393
1263977178538
13575794606844
145182151461596
1546639363154367
16419754268389304
173777788415503738

[2,18,165,1486,13376,120384,1083459,9751132,
 87760190,789841710,7108575393,63977178538,
 575794606844,5182151461596,46639363154367,
 419754268389304,3777788415503738]