T(n,k) = 1/12 the number of (n+1) X (k+1) 0..5 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease, and at least two adjacent blocks having the same increasing direction.

A183729

T(n,k) = 1/12 the number of (n+1) X (k+1) 0..5 arrays with every 2 X 2 subblock strictly increasing clockwise or counterclockwise with one decrease, and at least two adjacent blocks having the same increasing direction.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =12a(4) =2a(5) =12a(6) =87a(7) =29a(8) =29a(9) =87a(10) =537a(11) =388a(12) =124a(13) =388a(14) =537a(15) =3070a(16) =4170a(17) =1790a(18) =1790a(19) =4170a(20) =3070a(21) =16731a(22) =41423a(23) =30939a(24) =14886a(25) =30939a(26) =41423a(27) =16731a(28) =88331a(29) =388998

External references