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A059251 as a simple table

na(n)
11
21
35
415
544
699
7217
8429
9811
101430
112438
123978
136312
149690
1514550
1621318
1730669
1843263
1960115
2082225
21111044
22148005
23195143
24254475
25328759
26420732
27534076
28672452
29840656
301043460
311287036
321577532
331922745
342330445
352810385
363372291

[1,1,5,15,44,99,217,429,811,1430,2438,3978,6312,
 9690,14550,21318,30669,43263,60115,82225,111044,
 148005,195143,254475,328759,420732,534076,672452,
 840656,1043460,1287036,1577532,1922745,2330445,
 2810385,3372291]