Number of length-n 0..n arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.
A268450
Number of length-n 0..n arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.
Terms
- a(0) =2a(1) =9a(2) =61a(3) =581a(4) =7160a(5) =108032a(6) =1926444a(7) =39616567a(8) =922677334a(9) =24000231919a(10) =689530024294
External references
- oeis: A268450