Number of (n+1)X(1+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
A235838
Number of (n+1)X(1+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise.
Terms
- a(0) =81a(1) =487a(2) =2581a(3) =12373a(4) =55929a(5) =241933a(6) =1015889a(7) =4174941a(8) =16895401a(9) =67647573a(10) =268781649a(11) =1062687069a(12) =4187377529a(13) =16469997477a(14) =64715520737a(15) =254249916141a(16) =999126102153
External references
- oeis: A235838