Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

A302077

Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =18a(2) =70a(3) =265a(4) =1018a(5) =3914a(6) =15017a(7) =57850a(8) =222146a(9) =855385a(10) =3287398a(11) =12651474a(12) =48644813a(13) =187150738a(14) =719753422a(15) =2768709321a(16) =10649029682a(17) =40961783594a(18) =157553086817a(19) =606019586218

External references