Number of nX6 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A300767

Number of nX6 0..1 arrays with every element equal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =90a(2) =228a(3) =728a(4) =2361a(5) =8090a(6) =28397a(7) =97991a(8) =344671a(9) =1226058a(10) =4325299a(11) =15329202a(12) =54435548a(13) =193881831a(14) =691863545a(15) =2472483663a(16) =8846808566a(17) =31680088774a(18) =113506670987a(19) =406870197086

External references