Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and the median of every three consecutive elements nondecreasing.

A263593

Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and the median of every three consecutive elements nondecreasing.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =16a(4) =52a(5) =164a(6) =476a(7) =1428a(8) =4308a(9) =12816a(10) =38324a(11) =114924a(12) =343696a(13) =1028096a(14) =3077672a(15) =9209704a(16) =27556452a(17) =82465380a(18) =246779888a(19) =738461796a(20) =2209820148a(21) =6612853424a(22) =19788642456a(23) =59216642832a(24) =177203814880a(25) =530275470412

External references