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A250649 as a simple table

na(n)
128
2280
31424
44853
512473
628379
756088
8103712
9175998
10289559
11445513
12675267
13974698
141392138
151913166
162619191
173465655
184583225
195895042
207580998
219518912
2211977473
2314741143
2418198445
2522042896
2626774380
2731970892
2838321697
2945196741

[28,280,1424,4853,12473,28379,56088,103712,175998,
 289559,445513,675267,974698,1392138,1913166,
 2619191,3465655,4583225,5895042,7580998,9518912,
 11977473,14741143,18198445,22042896,26774380,
 31970892,38321697,45196741]