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A239245 as a simple table

na(n)
1240
25625
340625
41640625
54140625
639495680
747265625
856640625
93574214656
1066247700480
11115760971776
12233469644963840
131298980712890625
146544914573295616
156233428515519201280

[240,5625,40625,1640625,4140625,39495680,47265625,
 56640625,3574214656,66247700480,115760971776,
 233469644963840,1298980712890625,6544914573295616,
 6233428515519201280]