Number of nX4 0..1 arrays with every element unequal to 0, 1, 3 or 8 king-move adjacent elements, with upper left element zero.

A304217

Number of nX4 0..1 arrays with every element unequal to 0, 1, 3 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =17a(2) =17a(3) =32a(4) =62a(5) =108a(6) =190a(7) =348a(8) =636a(9) =1152a(10) =2082a(11) =3768a(12) =6840a(13) =12412a(14) =22486a(15) =40744a(16) =73872a(17) =133932a(18) =242782a(19) =440076a(20) =797732a(21) =1446128a(22) =2621506a(23) =4752084a(24) =8614284a(25) =15615592a(26) =28307242a(27) =51313936a(28) =93019232a(29) =168620580

External references