Number of length-n 0..5 arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.
A268454
Number of length-n 0..5 arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.
Terms
- a(0) =6a(1) =36a(2) =211a(3) =1231a(4) =7160a(5) =41526a(6) =240170a(7) =1385338a(8) =7970326a(9) =45742764a(10) =261899866a(11) =1496074920a(12) =8527336280a(13) =48500972230a(14) =275294704851
External references
- oeis: A268454