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A196421 as a simple table

na(n)
12
29
330
470
5165
6273
7476
8684
91035
101595
112046
122886
133731
144515
155640
167208
179027
1810431
1912730
2014910
2116863
2219987
2322908
2426700
2531525
2635451
2738934
2843442
2947415
3052545
3162992
3269168
3376857
3482705
3593870
36100566
37110371
38120783
39130260
40141860

[2,9,30,70,165,273,476,684,1035,1595,2046,2886,
 3731,4515,5640,7208,9027,10431,12730,14910,16863,
 19987,22908,26700,31525,35451,38934,43442,47415,
 52545,62992,69168,76857,82705,93870,100566,110371,
 120783,130260,141860]