Number of length-n 0..6 arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.
A268455
Number of length-n 0..6 arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.
Terms
- a(0) =7a(1) =49a(2) =337a(3) =2311a(4) =15816a(5) =108032a(6) =736525a(7) =5012171a(8) =34047931a(9) =230889543a(10) =1563104184a(11) =10564826628a(12) =71293105297a(13) =480355314513
External references
- oeis: A268455