T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.
A236523
T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the difference of the upper median and minimum value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.
Terms
- a(0) =16a(1) =52a(2) =52a(3) =160a(4) =264a(5) =160a(6) =476a(7) =1256a(8) =1256a(9) =476a(10) =1392a(11) =5670a(12) =9212a(13) =5670a(14) =1392a(15) =4020a(16) =25023a(17) =63208a(18) =63208a(19) =25023a(20) =4020a(21) =11520a(22) =108214a(23) =421516a(24) =655460a(25) =421516a(26) =108214a(27) =11520a(28) =32828a(29) =462970
External references
- oeis: A236523