Number of nX4 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1, and 2 introduced before 3 in row major order.
A204297
Number of nX4 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1, and 2 introduced before 3 in row major order.
Terms
- a(0) =0a(1) =16a(2) =160a(3) =5956a(4) =56104a(5) =1972288a(6) =38262132a(7) =826746944a(8) =19525910056a(9) =432375489440
External references
- oeis: A204297