a(n) = Product_{k=1..n} Product_{i=1..k-1} gcd(k,i).
A224479
a(n) = Product_{k=1..n} Product_{i=1..k-1} gcd(k,i).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =24a(7) =24a(8) =384a(9) =3456a(10) =276480a(11) =276480a(12) =955514880a(13) =955514880a(14) =428070666240
External references
- oeis: A224479