Number of n X n matrices (up to permutation of their rows and columns) with entries {0,1,2} with all row and column sums equal to 3.
A328159
Number of n X n matrices (up to permutation of their rows and columns) with entries {0,1,2} with all row and column sums equal to 3.
Terms
- a(0) =0a(1) =1a(2) =3a(3) =7a(4) =19a(5) =72a(6) =280a(7) =1348a(8) =7542a(9) =48290a(10) =348902a(11) =2805666a(12) =24797845a(13) =238678891a(14) =2482575930a(15) =27731295522a(16) =330955304428
External references
- oeis: A328159