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A250139 as a simple table

na(n)
1512
23032
317424
4100962
5526032
62637228
713201680
863266403
9294117016
101356124591
116123402680
1227078749276
13118540860840
14512525576700
152185199417888
169229243091805
1738636507955016
18160181736343585

[512,3032,17424,100962,526032,2637228,13201680,
 63266403,294117016,1356124591,6123402680,
 27078749276,118540860840,512525576700,
 2185199417888,9229243091805,38636507955016,
 160181736343585]