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A038406 as a simple table

na(n)
01
14
210
320
435
555
678
7103
8133
9173
10217
11259
12306
13361
14420
15480
16545
17616
18690
19769
20852
21938
221027
231124
241227
251331
261441
271553
281667
291788
301917
312047
322176
332316
342462
352606
362752
372910
383074
393235
403405
413580
423753
433929
444117
454311
464501

[1,4,10,20,35,55,78,103,133,173,217,259,306,361,
 420,480,545,616,690,769,852,938,1027,1124,1227,
 1331,1441,1553,1667,1788,1917,2047,2176,2316,2462,
 2606,2752,2910,3074,3235,3405,3580,3753,3929,4117,
 4311,4501]