T(n,k)=number of nXk binary matrices with floor((n*k)/2) 1's and rows in lexicographically nondecreasing order and columns in strictly increasing order.
A180983
T(n,k)=number of nXk binary matrices with floor((n*k)/2) 1's and rows in lexicographically nondecreasing order and columns in strictly increasing order.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =0a(4) =2a(5) =1a(6) =0a(7) =1a(8) =4a(9) =1a(10) =0a(11) =1a(12) =6a(13) =6a(14) =1a(15) =0a(16) =0a(17) =10a(18) =20a(19) =9a(20) =1a(21) =0a(22) =0a(23) =9a(24) =71a(25) =49a(26) =12a(27) =1a(28) =0a(29) =0
External references
- oeis: A180983