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A251838 as a simple table

na(n)
1974
2981
3641
4872
51443
61951
72784
84949
97897
1011384
1121033
1235203
1350846
1495287
15161329
16232978
17438821
18745265
191075374
202030079
213451785
224975148
239405623
2416003305
2523037002
2643604345
2774229499
28106714968
29202216349
30344400871

[974,981,641,872,1443,1951,2784,4949,7897,11384,
 21033,35203,50846,95287,161329,232978,438821,
 745265,1075374,2030079,3451785,4975148,9405623,
 16003305,23037002,43604345,74229499,106714968,
 202216349,344400871]