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A300445 as a simple table

na(n)
10
20
30
41
53
69
719
838
964
10106
11162
12243
13343
14479
15645
16860
171110
181424
191790
202237
212743
223349
234035
244842
255734
266770
277920
289239
2910679
3012315
3114105
3216120
3318290
3420716
3523342
3626257
3729377
3832821
3936517
4040574
4144880
4249586
4354602
4460059
4565827
4672079
4778705
4885860
4993376
50101468

[0,0,0,1,3,9,19,38,64,106,162,243,343,479,645,860,
 1110,1424,1790,2237,2743,3349,4035,4842,5734,6770,
 7920,9239,10679,12315,14105,16120,18290,20716,
 23342,26257,29377,32821,36517,40574,44880,49586,
 54602,60059,65827,72079,78705,85860,93376,101468]