Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and with no two consecutive increases.

A263639

Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and with no two consecutive increases.

Terms

    a(0) =1a(1) =2a(2) =5a(3) =17a(4) =70a(5) =226a(6) =538a(7) =1417a(8) =3734a(9) =10564a(10) =29274a(11) =81109a(12) =219924a(13) =603970a(14) =1654203a(15) =4552899a(16) =12482279a(17) =34293113a(18) =93987924a(19) =258097242a(20) =707931841a(21) =1943681720a(22) =5332252281a(23) =14636363836a(24) =40158264369a(25) =110218824475a(26) =302439248237

External references