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

A232257

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

Terms

    a(0) =9a(1) =37a(2) =37a(3) =215a(4) =421a(5) =163a(6) =1287a(7) =6189a(8) =4711a(9) =723a(10) =7673a(11) =96999a(12) =175431a(13) =52779a(14) =3209a(15) =45709a(16) =1532151a(17) =7258599a(18) =4987471a(19) =591181a(20) =14245a(21) =272417a(22) =24091773a(23) =304291873a(24) =544777651a(25) =141815403a(26) =6622029a(27) =63235a(28) =1623601a(29) =379188715

External references