Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 places and the median of every three consecutive elements nondecreasing.

A263596

Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 places and the median of every three consecutive elements nondecreasing.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =16a(4) =52a(5) =208a(6) =800a(7) =3360a(8) =14024a(9) =55492a(10) =223040a(11) =900728a(12) =3560916a(13) =14099980a(14) =56141676a(15) =222623336a(16) =881949584a(17) =3502057736a(18) =13900013276a(19) =55132695636a(20) =218842222824a(21) =868762179984

External references