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A033568 as a simple table

na(n)
01
12
215
340
477
5126
6187
7260
8345
9442
10551
11672
12805
13950
141107
151276
161457
171650
181855
192072
202301
212542
222795
233060
243337
253626
263927
274240
284565
294902
305251
315612
325985
336370
346767
357176
367597
378030
388475
398932
409401
419882
4210375
4310880
4411397
4511926

[1,2,15,40,77,126,187,260,345,442,551,672,805,950,
 1107,1276,1457,1650,1855,2072,2301,2542,2795,3060,
 3337,3626,3927,4240,4565,4902,5251,5612,5985,6370,
 6767,7176,7597,8030,8475,8932,9401,9882,10375,
 10880,11397,11926]