Number of ways to arrange the numbers (1,3,5,7,9,...,2n-1) in a circle such that every two adjacent numbers are relatively prime.
A107763
Number of ways to arrange the numbers (1,3,5,7,9,...,2n-1) in a circle such that every two adjacent numbers are relatively prime.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =12a(5) =72a(6) =480a(7) =864a(8) =9600a(9) =108000a(10) =312000a(11) =4795200a(12) =46293120a(13) =241056000a(14) =4759413120a(15) =94182359040a(16) =478511953920
External references
- oeis: A107763