a(n) = product[k=1..n] P(k), where P(k) is the largest prime <= 2*k. a(n) = product[k=1..n] A060308(k).

A118747

a(n) = product[k=1..n] P(k), where P(k) is the largest prime <= 2*k. a(n) = product[k=1..n] A060308(k).

Terms

    a(0) =2a(1) =6a(2) =30a(3) =210a(4) =1470a(5) =16170a(6) =210210a(7) =2732730a(8) =46456410a(9) =882671790a(10) =16770764010a(11) =385727572230

External references