Number of 2 X n 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.

A269036

Number of 2 X n 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.

Terms

    a(0) =0a(1) =24a(2) =48a(3) =216a(4) =672a(5) =2208a(6) =6912a(7) =21408a(8) =65280a(9) =196992a(10) =589056a(11) =1748352a(12) =5156352a(13) =15124992a(14) =44156928a(15) =128383488a(16) =371908608a(17) =1073879040a(18) =3091820544a(19) =8878479360a(20) =25435250688a(21) =72710922240a(22) =207448571904a(23) =590798364672

External references