Number of 3 X n 0-1 matrices which have n+2 1's and have no zero rows or zero columns.
A084485
Number of 3 X n 0-1 matrices which have n+2 1's and have no zero rows or zero columns.
Terms
- a(0) =1a(1) =12a(2) =90a(3) =522a(4) =2595a(5) =11673a(6) =49014a(7) =195828a(8) =753813a(9) =2819475a(10) =10308144a(11) =36998118a(12) =130786695a(13) =456452493a(14) =1575799290a(15) =5389290792a(16) =18281487081a(17) =61569776727a(18) =206040460212a(19) =685584843450
External references
- oeis: A084485