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A020251 as a simple table

na(n)
1217
2781
31541
41891
54123
65461
75611
85731
97813
108911
1111041
1213021
1313333
1414981
1515751
1616297
1717767
1822791
1923653
2024211
2125327
2225351
2329539
2435371
2536991
2638081
2740501
2842127
2944173
3044801
3147641
3248133
3353083
3453971
3558807
3668251
3779381
3888831

[217,781,1541,1891,4123,5461,5611,5731,7813,8911,
 11041,13021,13333,14981,15751,16297,17767,22791,
 23653,24211,25327,25351,29539,35371,36991,38081,
 40501,42127,44173,44801,47641,48133,53083,53971,
 58807,68251,79381,88831]