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A316261 as a simple table

na(n)
01
13
29
315
426
537
655
773
8100
9127
10165
11203
12254
13305
14371
15437
16520
17603
18705
19807
20930
211053
221199
231345
241516
251687
261885
272083
282310
292537
302795
313053
323344
333635
343961
354287
364650
375013
385415
395817
406260

[1,3,9,15,26,37,55,73,100,127,165,203,254,305,371,
 437,520,603,705,807,930,1053,1199,1345,1516,1687,
 1885,2083,2310,2537,2795,3053,3344,3635,3961,4287,
 4650,5013,5415,5817,6260]