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A257947 as a simple table

na(n)
41
526
61858
7236926
853470032
921496173692
1015580846842786
1120666722709050752
1250987383226899017116
13237747620610010161018672
142125708489963555363039732518
1536886187432874074894930307867796
161253964425811022692146824416678500176

[1,26,1858,236926,53470032,21496173692,
 15580846842786,20666722709050752,
 50987383226899017116,237747620610010161018672,
 2125708489963555363039732518,
 36886187432874074894930307867796,
 1253964425811022692146824416678500176]