T(n,k)=Number of nXk -2..2 arrays of 2X2 subblock diagonal sums minus antidiagonal sums for some (n+1)X(k+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.

A227060

T(n,k)=Number of nXk -2..2 arrays of 2X2 subblock diagonal sums minus antidiagonal sums for some (n+1)X(k+1) binary array with rows and columns of the latter in lexicographically nondecreasing order.

Terms

    a(0) =4a(1) =10a(2) =10a(3) =20a(4) =40a(5) =20a(6) =35a(7) =124a(8) =124a(9) =35a(10) =56a(11) =329a(12) =643a(13) =329a(14) =56a(15) =84a(16) =777a(17) =2934a(18) =2934a(19) =777a(20) =84a(21) =120a(22) =1673a(23) =11810a(24) =24511a(25) =11810a(26) =1673a(27) =120a(28) =165a(29) =3341

External references