Number of nX5 0..1 arrays with every element unequal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A318034

Number of nX5 0..1 arrays with every element unequal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =22a(2) =58a(3) =176a(4) =580a(5) =1910a(6) =6525a(7) =23463a(8) =84609a(9) =306640a(10) =1111482a(11) =4032505a(12) =14616910a(13) =53018958a(14) =192322953a(15) =697961938a(16) =2533165534a(17) =9196221022a(18) =33385800165a(19) =121213219813a(20) =440082870925

External references