Number of 0..n arrays of length 7 with each element differing from at least one neighbor by something other than 1.
A221577
Number of 0..n arrays of length 7 with each element differing from at least one neighbor by something other than 1.
Terms
- a(0) =16a(1) =345a(2) =4240a(3) =26911a(4) =117104a(5) =395641a(6) =1116400a(7) =2754635a(8) =6127696a(9) =12553189a(10) =24049616a(11) =43584535a(12) =75375280a(13) =125247281a(14) =201055024a(15) =313170691a(16) =475045520a(17) =703848925a(18) =1021190416a(19) =1453929359a(20) =2035077616a(21) =2804800105a(22) =3811518320
External references
- oeis: A221577