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A281660 as a simple table

na(n)
01
12
215
320
485
578
6259
7200
8585
9410
101111
11732
121885
131190
142955
151808
164369
172610
186175
193620
208421
214862
2211155
236360
2414425
258138
2618279
2710220
2822765
2912630
3027931
3115392
3233825
3318530
3440495
3522068
3647989
3726030
3856355
3930440
4065641
4135322

[1,2,15,20,85,78,259,200,585,410,1111,732,1885,
 1190,2955,1808,4369,2610,6175,3620,8421,4862,
 11155,6360,14425,8138,18279,10220,22765,12630,
 27931,15392,33825,18530,40495,22068,47989,26030,
 56355,30440,65641,35322]