Number of nX2 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors.
A199224
Number of nX2 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors.
Terms
- a(0) =1a(1) =6a(2) =15a(3) =148a(4) =739a(5) =1538a(6) =19458a(7) =99290a(8) =199245a(9) =2737170a(10) =14308328a(11) =28263858a(12) =406132996a(13) =2157586976a(14) =4223483322a(15) =62496247170a(16) =335699045124a(17) =653268735784
External references
- oeis: A199224