

A078260


a(n) = denominator(N), where N = 0.246...up to 2n (concatenation 2 to 2n of first n even numbers after decimal point).


1



5, 25, 500, 2500, 500000, 25000000, 5000000000, 125000000000, 50000000000000, 2500000000000000, 500000000000000000, 6250000000000000000, 5000000000000000000000, 250000000000000000000000
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