T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the sum of the upper and lower median values of each 2X2 subblock.
A236657
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays colored with the sum of the upper and lower median values of each 2X2 subblock.
Terms
- a(0) =256a(1) =2896a(2) =2896a(3) =32424a(4) =70896a(5) =32424a(6) =370352a(7) =1680044a(8) =1680044a(9) =370352a(10) =4235056a(11) =41161740a(12) =81224020a(13) =41161740a(14) =4235056a(15) =48229536a(16) =1012773632a(17) =4119658692a(18) =4119658692a(19) =1012773632a(20) =48229536a(21) =549313480a(22) =24759554960a(23) =211585138552
External references
- oeis: A236657