Triangle read by rows: T(n,k) (n >= 0, 0 <= k <= n) gives number of {0,1} n X n matrices with all row and column sums equal to k.
A008300
Triangle read by rows: T(n,k) (n >= 0, 0 <= k <= n) gives number of {0,1} n X n matrices with all row and column sums equal to k.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =6a(8) =6a(9) =1a(10) =1a(11) =24a(12) =90a(13) =24a(14) =1a(15) =1a(16) =120a(17) =2040a(18) =2040a(19) =120a(20) =1a(21) =1a(22) =720a(23) =67950a(24) =297200a(25) =67950a(26) =720a(27) =1a(28) =1a(29) =5040
External references
- oeis: A008300