Number of n X 2 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three no more than once.
A269103
Number of n X 2 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three no more than once.
Terms
- a(0) =16a(1) =180a(2) =1740a(3) =15540a(4) =132300a(5) =1090740a(6) =8787660a(7) =69580980a(8) =543538380a(9) =4200069300a(10) =32167589580a(11) =244542858420
External references
- oeis: A269103