T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise.
A235413
T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise.
Terms
- a(0) =16a(1) =44a(2) =44a(3) =121a(4) =172a(5) =121a(6) =286a(7) =704a(8) =704a(9) =286a(10) =676a(11) =2302a(12) =4256a(13) =2302a(14) =676a(15) =1482a(16) =7617a(17) =20398a(18) =20398a(19) =7617a(20) =1482a(21) =3249a(22) =21707a(23) =98575a(24) =150862a(25) =98575a(26) =21707a(27) =3249a(28) =6840a(29) =62070
External references
- oeis: A235413