T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing.
A206223
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing.
Terms
- a(0) =81a(1) =452a(2) =452a(3) =1970a(4) =7313a(5) =1970a(6) =8128a(7) =73133a(8) =73133a(9) =8128a(10) =33386a(11) =656053a(12) =1782191a(13) =656053a(14) =33386a(15) =139390a(16) =5862927a(17) =35625711a(18) =35625711a(19) =5862927a(20) =139390a(21) =588254a(22) =53835891a(23) =600064928a(24) =1827047303a(25) =600064928a(26) =53835891a(27) =588254a(28) =2496440
External references
- oeis: A206223