Number of 0..n arrays of length 7 with each element differing from at least one neighbor by 2 or more.

A221527

Number of 0..n arrays of length 7 with each element differing from at least one neighbor by 2 or more.

Terms

    a(0) =0a(1) =16a(2) =768a(3) =8544a(4) =50400a(5) =205080a(6) =654864a(7) =1763328a(8) =4184064a(9) =9005400a(10) =17936160a(11) =33537504a(12) =59505888a(13) =101012184a(14) =165102000a(15) =261162240a(16) =401458944a(17) =601751448a(18) =881987904a(19) =1267087200a(20) =1787812320a(21) =2481740184a(22) =3394333008a(23) =4580116224

External references