Number of (n+1)X(1+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
A235556
Number of (n+1)X(1+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
Terms
- a(0) =256a(1) =2612a(2) =23024a(3) =180640a(4) =1321956a(5) =9182760a(6) =61590128a(7) =402719344a(8) =2587649440a(9) =16427598848a(10) =103462837312a(11) =648431897408
External references
- oeis: A235556