Number of length-4 0..n arrays with no repeated value differing from the previous repeated value by other than plus two or minus 1.

A269641

Number of length-4 0..n arrays with no repeated value differing from the previous repeated value by other than plus two or minus 1.

Terms

    a(0) =9a(1) =63a(2) =221a(3) =567a(4) =1209a(5) =2279a(6) =3933a(7) =6351a(8) =9737a(9) =14319a(10) =20349a(11) =28103a(12) =37881a(13) =50007a(14) =64829a(15) =82719a(16) =104073a(17) =129311a(18) =158877a(19) =193239a(20) =232889a(21) =278343a(22) =330141a(23) =388847a(24) =455049a(25) =529359a(26) =612413a(27) =704871a(28) =807417a(29) =920759

External references