Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and every three consecutive elements having its maximum within 4 of its minimum.

A263698

Number of length n arrays of permutations of 0..n-1 with each element moved by -3 to 3 places and every three consecutive elements having its maximum within 4 of its minimum.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =24a(4) =78a(5) =110a(6) =169a(7) =301a(8) =616a(9) =1373a(10) =2908a(11) =5908a(12) =11544a(13) =22644a(14) =45460a(15) =91977a(16) =186645a(17) =376625a(18) =756105a(19) =1518054a(20) =3049762a(21) =6137766a(22) =12359571a(23) =24876504a(24) =50054780a(25) =100682624a(26) =202531226a(27) =407477585a(28) =819858684a(29) =1649639041

External references