Number of nX4 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300685
Number of nX4 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =2a(1) =30a(2) =272a(3) =2229a(4) =18225a(5) =150558a(6) =1242620a(7) =10252421a(8) =84598340a(9) =698058898a(10) =5760016131a(11) =47528661500a(12) =392181902406
External references
- oeis: A300685