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A062988 as a simple table

na(n)
05
120
255
3125
4251
5461
6791
71286
82001
93002
104367
116187
128567
1311627
1415503
1520348
1626333
1733648
1842503
1953129
2065779
2180729
2298279
23118754
24142505
25169910
26201375
27237335
28278255
29324631

[5,20,55,125,251,461,791,1286,2001,3002,4367,6187,
 8567,11627,15503,20348,26333,33648,42503,53129,
 65779,80729,98279,118754,142505,169910,201375,
 237335,278255,324631]