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A301244 as a simple table

na(n)
01
14
210
320
435
556
680
7105
8135
9174
10217
11259
12306
13361
14420
15480
16545
17616
18690
19770
20854
21940
221029
231125
241227
251331
261441
271553
281667
291788
301917
312047
322176
332317
342464
352608
362754
372911
383074
393235
403405
413580
423753
433929
444117
454311
464501

[1,4,10,20,35,56,80,105,135,174,217,259,306,361,
 420,480,545,616,690,770,854,940,1029,1125,1227,
 1331,1441,1553,1667,1788,1917,2047,2176,2317,2464,
 2608,2754,2911,3074,3235,3405,3580,3753,3929,4117,
 4311,4501]