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A357679 as a simple table

na(n)
221
350
4112
5220
6364
7544
8760
91104
101566
112046
122664
133280
143784
154512
165618
176726
187686
198844
209940
2110950
2212324
2313944
2416020
2518430
2620200
2721424
2822684
2923980
3026668
3130988
3234584
3336990
3439754
3543210
3646206
3749298
3852812
3956112
4059858
4163366
4266970
4371434
4474884
4577224
4681192

[21,50,112,220,364,544,760,1104,1566,2046,2664,
 3280,3784,4512,5618,6726,7686,8844,9940,10950,
 12324,13944,16020,18430,20200,21424,22684,23980,
 26668,30988,34584,36990,39754,43210,46206,49298,
 52812,56112,59858,63366,66970,71434,74884,77224,
 81192]