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A001520 as a simple table

na(n)
015
1693
23315
39177
419575
535805
659163
790945
8132447
9184965
10249795
11328233
12421575
13531117
14658155
15803985
16969903
171157205
181367187
191601145
201860375
212146173
222459835
232802657
243175935
253580965
264019043
274491465
284999527
295544525
306127755
316750513

[15,693,3315,9177,19575,35805,59163,90945,132447,
 184965,249795,328233,421575,531117,658155,803985,
 969903,1157205,1367187,1601145,1860375,2146173,
 2459835,2802657,3175935,3580965,4019043,4491465,
 4999527,5544525,6127755,6750513]