Number of permutations of (1,3,5,7,9,...,2n-1) where every adjacent pair in the permutation are coprime.
A107761
Number of permutations of (1,3,5,7,9,...,2n-1) where every adjacent pair in the permutation are coprime.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =72a(5) =480a(6) =3600a(7) =9600a(8) =108000a(9) =1270080a(10) =4795200a(11) =74088000a(12) =768539520a(13) =4759413120a(14) =94182359040
External references
- oeis: A107761