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A213949 as a simple table

na(n)
11
24
310
418
536
657
777
8110
9141
10177
11232
12270
13337
14402
15453
16566
17610
18721

[1,4,10,18,36,57,77,110,141,177,232,270,337,402,
 453,566,610,721]