Number of n X 3 0..3 arrays with row sums 3 and column sums n.
A172743
Number of n X 3 0..3 arrays with row sums 3 and column sums n.
Terms
- a(0) =1a(1) =7a(2) =55a(3) =415a(4) =3391a(5) =28681a(6) =248137a(7) =2186815a(8) =19546975a(9) =176703337a(10) =1612210777a(11) =14823083089a(12) =137176167025
External references
- oeis: A172743