a(1) = 1; for n > 1, a(n) = n! divided by product of factorials of all prime divisors of n.

A075072

a(1) = 1; for n > 1, a(n) = n! divided by product of factorials of all prime divisors of n.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =12a(4) =1a(5) =60a(6) =1a(7) =20160a(8) =60480a(9) =15120a(10) =1a(11) =39916800a(12) =1a(13) =8648640a(14) =1816214400a(16) =1a(18) =1a(22) =1

External references