Number of nX3 0..2 arrays with row sums equal and column sums equal.
A203559
Number of nX3 0..2 arrays with row sums equal and column sums equal.
Terms
- a(0) =3a(1) =9a(2) =87a(3) =177a(4) =993a(5) =10833a(6) =35619a(7) =219873a(8) =2083713a(9) =8710539a(10) =55644339a(11) =473819481a(12) =2320792659a(13) =15120204297a(14) =119105713827a(15) =650725327233
External references
- oeis: A203559