Number of (n+1)X(3+1) 0..1 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise.
A235512
Number of (n+1)X(3+1) 0..1 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise.
Terms
- a(0) =209a(1) =2501a(2) =29533a(3) =343063a(4) =3977050a(5) =45985647a(6) =531586422a(7) =6142770286a(8) =70981491138a(9) =820170288679
External references
- oeis: A235512