Number of nX3 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A317810

Number of nX3 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =4a(4) =5a(5) =8a(6) =9a(7) =28a(8) =44a(9) =60a(10) =118a(11) =256a(12) =409a(13) =700a(14) =1342a(15) =2570a(16) =4409a(17) =7921a(18) =14776a(19) =27269a(20) =48326a(21) =87891a(22) =161611a(23) =294704a(24) =530298a(25) =966374a(26) =1764843a(27) =3208891a(28) =5812069a(29) =10586099

External references