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A004120 as a simple table

na(n)
01
14
29
316
425
535
646
758
871
985
10100
11116
12133
13151
14170
15190
16211
17233
18256
19280
20305
21331
22358
23386
24415
25445
26476
27508
28541
29575
30610
31646
32683
33721
34760
35800
36841
37883
38926
39970
401015
411061
421108
431156
441205

[1,4,9,16,25,35,46,58,71,85,100,116,133,151,170,
 190,211,233,256,280,305,331,358,386,415,445,476,
 508,541,575,610,646,683,721,760,800,841,883,926,
 970,1015,1061,1108,1156,1205]