Number of length-4 0..n arrays with no repeated value differing from the previous repeated value by other than one.

A269538

Number of length-4 0..n arrays with no repeated value differing from the previous repeated value by other than one.

Terms

    a(0) =10a(1) =64a(2) =222a(3) =568a(4) =1210a(5) =2280a(6) =3934a(7) =6352a(8) =9738a(9) =14320a(10) =20350a(11) =28104a(12) =37882a(13) =50008a(14) =64830a(15) =82720a(16) =104074a(17) =129312a(18) =158878a(19) =193240a(20) =232890a(21) =278344a(22) =330142a(23) =388848a(24) =455050a(25) =529360a(26) =612414a(27) =704872a(28) =807418a(29) =920760

External references