Number of (n+1)X(2+1) 0..1 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise.
A235511
Number of (n+1)X(2+1) 0..1 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise.
Terms
- a(0) =58a(1) =382a(2) =2501a(3) =16117a(4) =103736a(5) =666171a(6) =4277473a(7) =27457539a(8) =176252122a(9) =1131335938a(10) =7261887435a(11) =46612840826a(12) =299200172520
External references
- oeis: A235511