Number of length n arrays of permutations of 0..n-1 with each element moved by -2 to 2 places and every three consecutive elements having its maximum within 4 of its minimum.
A263697
Number of length n arrays of permutations of 0..n-1 with each element moved by -2 to 2 places and every three consecutive elements having its maximum within 4 of its minimum.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =14a(4) =31a(5) =56a(6) =104a(7) =208a(8) =418a(9) =873a(10) =1772a(11) =3545a(12) =7103a(13) =14180a(14) =28572a(15) =57620a(16) =116055a(17) =233735a(18) =469754a(19) =944670a(20) =1900425a(21) =3823544a(22) =7695342a(23) =15483113a(24) =31150656a(25) =62671350a(26) =126083545a(27) =253679744a(28) =510398235a(29) =1026910104
External references
- oeis: A263697