T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with every element both >= and <= some horizontal or vertical neighbor.

A232124

T(n,k) = Number of (n+1) X (k+1) 0..2 arrays with every element both >= and <= some horizontal or vertical neighbor.

Terms

    a(0) =15a(1) =109a(2) =109a(3) =611a(4) =1667a(5) =611a(6) =3635a(7) =26029a(8) =26029a(9) =3635a(10) =21717a(11) =411015a(12) =1060647a(13) =411015a(14) =21717a(15) =129323a(16) =6462505a(17) =44229031a(18) =44229031a(19) =6462505a(20) =129323a(21) =770747a(22) =101738935a(23) =1841606457a(24) =4894583715a(25) =1841606457a(26) =101738935a(27) =770747a(28) =4593729

External references