a(n) = Sum_{d|n} phi(d)*(n/d)! for n > 0, a(0) = 0.
A327030
a(n) = Sum_{d|n} phi(d)*(n/d)! for n > 0, a(0) = 0.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =8a(4) =28a(5) =124a(6) =732a(7) =5046a(8) =40352a(9) =362898a(10) =3628932a(11) =39916810a(12) =479002388a(13) =6227020812a(14) =87178296258
External references
- oeis: A327030