Number of n X 3 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.

A268784

Number of n X 3 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.

Terms

    a(0) =2a(1) =17a(2) =72a(3) =302a(4) =1144a(5) =4207a(6) =14984a(7) =52335a(8) =179854a(9) =610504a(10) =2051436a(11) =6836258a(12) =22622554a(13) =74418562a(14) =243553160a(15) =793537401a(16) =2575357784a(17) =8329124488a(18) =26854438804a(19) =86342760711a(20) =276915214344a(21) =886094782671

External references