T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise.
A235772
T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise.
Terms
- a(0) =16a(1) =46a(2) =46a(3) =120a(4) =178a(5) =120a(6) =288a(7) =628a(8) =628a(9) =288a(10) =660a(11) =1948a(12) =2994a(13) =1948a(14) =660a(15) =1456a(16) =5643a(17) =12417a(18) =12417a(19) =5643a(20) =1456a(21) =3136a(22) =15185a(23) =47501a(24) =70752a(25) =47501a(26) =15185a(27) =3136a(28) =6624a(29) =39029
External references
- oeis: A235772