Number of n X 2 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three exactly once.
A269180
Number of n X 2 0..3 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling three exactly once.
Terms
- a(0) =4a(1) =48a(2) =384a(3) =2736a(4) =18336a(5) =118032a(6) =739008a(7) =4533744a(8) =27384288a(9) =163381968a(10) =965118720a(11) =5654345136a(12) =32898781728a(13) =190290667152
External references
- oeis: A269180