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A254831 as a simple table

na(n)
15
226
379
4166
5381
6547
71000
81604
92711
103568
115748
127202
1310309
1413708
1518424
1621680
1729290
1833838
1943620
2053191
2165777
2274117
2392538
24108621
25129911
26150358
27177085
28194481
29234256
30255180
31295309
32334682
33383062
34430087
35495280
36531746

[5,26,79,166,381,547,1000,1604,2711,3568,5748,
 7202,10309,13708,18424,21680,29290,33838,43620,
 53191,65777,74117,92538,108621,129911,150358,
 177085,194481,234256,255180,295309,334682,383062,
 430087,495280,531746]