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 rowwise and columnwise.
A235555
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 rowwise and columnwise.
Terms
- a(0) =16a(1) =46a(2) =46a(3) =120a(4) =202a(5) =120a(6) =288a(7) =814a(8) =814a(9) =288a(10) =660a(11) =2878a(12) =5567a(13) =2878a(14) =660a(15) =1456a(16) =9320a(17) =33851a(18) =33851a(19) =9320a(20) =1456a(21) =3136a(22) =27731a(23) =184281a(24) =378570a(25) =184281a(26) =27731a(27) =3136a(28) =6624a(29) =77606
External references
- oeis: A235555