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A038407 as a simple table

na(n)
01
14
210
321
436
553
676
7108
8142
9173
10210
11259
12310
13360
14418
15482
16546
17615
18692
19769
20848
21940
221036
231127
241224
251331
261438
271548
281672
291796
301912
312041
322184
332319
342452
352606
362766
372913
383068
393239
403404
413568
423754
433944
444118
454301
464504

[1,4,10,21,36,53,76,108,142,173,210,259,310,360,
 418,482,546,615,692,769,848,940,1036,1127,1224,
 1331,1438,1548,1672,1796,1912,2041,2184,2319,2452,
 2606,2766,2913,3068,3239,3404,3568,3754,3944,4118,
 4301,4504]