Number of permutations of (1,3,5,7,9,...,2n-1) in which every pair of adjacent numbers as well as the first and the last entries are relatively prime.
A107762
Number of permutations of (1,3,5,7,9,...,2n-1) in which every pair of adjacent numbers as well as the first and the last entries are relatively prime.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =60a(5) =432a(6) =3360a(7) =6912a(8) =86400a(9) =1080000a(10) =3432000a(11) =57542400a(12) =601810560a(13) =3374784000a(14) =71391196800
External references
- oeis: A107762