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A037588 as a simple table

na(n)
13
228
3255
42296
520667
6186004
71674039
815066352
9135597171
101220374540
1110983370863
1298850337768
13889653039915
148006877359236
1572061896233127
16648557066098144
175837013594883299

[3,28,255,2296,20667,186004,1674039,15066352,
 135597171,1220374540,10983370863,98850337768,
 889653039915,8006877359236,72061896233127,
 648557066098144,5837013594883299]