Number of (n+1) X (2+1) 0..1 arrays with the difference of the upper and lower median value of each 2 X 2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.
A235956
Number of (n+1) X (2+1) 0..1 arrays with the difference of the upper and lower median value of each 2 X 2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise.
Terms
- a(0) =50a(1) =228a(2) =928a(3) =3574a(4) =13346a(5) =48848a(6) =176420a(7) =631130a(8) =2242678a(9) =7930164a(10) =27941848a(11) =98196574a(12) =344438730a(13) =1206482520a(14) =4221685708a(15) =14761290914a(16) =51584989022a(17) =180196526268a(18) =629274809856
External references
- oeis: A235956