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A274250 as a simple table

na(n)
01
11
24
312
430
565
6127
7225
8374
9588
10884
111281
121801
132465
143300
154332
165590
177105
188911
1911041
2013534
2116428
2219764
2323585
2427937
2532865
2638420
2744652
2851614
2959361
3067951
3177441
3287894
3399372
34111940
35125665
36140617
37156865
38174484
39193548
40214134

[1,1,4,12,30,65,127,225,374,588,884,1281,1801,
 2465,3300,4332,5590,7105,8911,11041,13534,16428,
 19764,23585,27937,32865,38420,44652,51614,59361,
 67951,77441,87894,99372,111940,125665,140617,
 156865,174484,193548,214134]