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A293954 as a simple table

na(n)
01
14
226
3318
48362
5518136
679762944
731347878526
831875040276682
984415672202652576
10584440009839756835096
1110604211348847550536329728
12505234836942870203845022012928
1363320076924994011498092218964764672
1420908605974267058444111310750652481533952

[1,4,26,318,8362,518136,79762944,31347878526,
 31875040276682,84415672202652576,
 584440009839756835096,10604211348847550536329728,
 505234836942870203845022012928,
 63320076924994011498092218964764672,
 20908605974267058444111310750652481533952]