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

A280157

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

Terms

    a(0) =2a(1) =18a(2) =94a(3) =424a(4) =1854a(5) =7628a(6) =30874a(7) =123312a(8) =488256a(9) =1920790a(10) =7513678a(11) =29249892a(12) =113386708a(13) =437908264a(14) =1685639238a(15) =6469357240a(16) =24762845248a(17) =94557090250a(18) =360277506538

External references