T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the upper median plus the lower median of every 2X2 subblock equal.

A236746

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the upper median plus the lower median of every 2X2 subblock equal.

Terms

    a(0) =81a(1) =267a(2) =267a(3) =833a(4) =1411a(5) =833a(6) =2907a(7) =7377a(8) =7377a(9) =2907a(10) =10233a(11) =46377a(12) =68839a(13) =46377a(14) =10233a(15) =37467a(16) =300555a(17) =810039a(18) =810039a(19) =300555a(20) =37467a(21) =139201a(22) =2045011a(23) =9665961a(24) =17740369a(25) =9665961a(26) =2045011a(27) =139201a(28) =526395a(29) =14169625

External references