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A266471 as a simple table

na(n)
15
212
329
466
5137
6261
7463
8775
91237
101898
112817
124064
135721
147883
1510659
1614173
1718565
1823992
1930629
2038670
2148329
2259841
2373463
2489475
25108181
26129910
27155017
28183884
29216921
30254567
31297291
32345593
33400005
34461092
35529453
36605722
37690569

[5,12,29,66,137,261,463,775,1237,1898,2817,4064,
 5721,7883,10659,14173,18565,23992,30629,38670,
 48329,59841,73463,89475,108181,129910,155017,
 183884,216921,254567,297291,345593,400005,461092,
 529453,605722,690569]