Number of nX4 0..1 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

A279264

Number of nX4 0..1 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

Terms

    a(0) =2a(1) =20a(2) =86a(3) =400a(4) =1592a(5) =5888a(6) =21882a(7) =79112a(8) =281754a(9) =991292a(10) =3452756a(11) =11929580a(12) =40936072a(13) =139644508a(14) =473965068a(15) =1601601800a(16) =5391122062a(17) =18084715096a(18) =60480149694a(19) =201706042464a(20) =671036424848

External references