A120066 (n-1)! divided by (product phi(d)! ; d divides n).

1, 1, 1, 3, 1, 30, 1, 105, 28, 630, 1, 207900, 1, 12012, 45045, 675675, 1, 171531360, 1, 2618916300, 3527160, 3879876, 1, 139143023019000, 10626, 67603900, 43743700, 21925567263600, 1, 2360561385517335000, 1, 203067496256625, 14902327440

Offset: 1

Author

Martin Fuller, Jun 06 2006

Keywords

• nonn

Crossrefs

Cf. A120065.

Programs

PARI

a(n) = (n-1)! / prod(i=1, n, if(n%i==0, eulerphi(i)!, 1))