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A259161 as a simple table

na(n)
15
248510
3465793515
44472549283020
542945417749765025
6412361896760694487530
73959498889750770719498535
838019107927025003687930446040
9365059470355795195660737423378045
103505300996337237541709397051345542550
1133657899801770684519698434826282476187555

[5,48510,465793515,4472549283020,
 42945417749765025,412361896760694487530,
 3959498889750770719498535,
 38019107927025003687930446040,
 365059470355795195660737423378045,
 3505300996337237541709397051345542550,
 33657899801770684519698434826282476187555]