a(n) = n!*Sum_{k=1..n} mu(k)/k, where mu(k) is the Möbius function.
A068337
a(n) = n!*Sum_{k=1..n} mu(k)/k, where mu(k) is the Möbius function.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =4a(4) =-4a(5) =96a(6) =-48a(7) =-384a(8) =-3456a(9) =328320a(10) =-17280a(11) =-207360a(12) =-481697280a(13) =-516741120a(14) =79427174400a(16) =681401548800
External references
- oeis: A068337