Number of (n+1)X(4+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise.
A238251
Number of (n+1)X(4+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise.
Terms
- a(0) =286a(1) =2818a(2) =43456a(3) =523578a(4) =6683137a(5) =65450601a(6) =640472606a(7) =5080416791a(8) =40066932588a(9) =267891545518
External references
- oeis: A238251