Half the number of n X n symmetric binary matrices with no element equal to a strict majority of its horizontal and vertical neighbors.

A190625

Half the number of n X n symmetric binary matrices with no element equal to a strict majority of its horizontal and vertical neighbors.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =9a(4) =46a(5) =338a(6) =3788a(7) =62929a(8) =1549089a(9) =56951770a(10) =3109920701a(11) =252393913470

External references