Number of (n+1) X (1+1) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

A231295

Number of (n+1) X (1+1) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =12a(4) =32a(5) =92a(6) =264a(7) =756a(8) =2176a(9) =6252a(10) =17976a(11) =51684a(12) =148592a(13) =427228a(14) =1228328a(15) =3531604a(16) =10153824a(17) =29193548a(18) =83935256a(19) =241324740a(20) =693839952a(21) =1994879932a(22) =5735538696a(23) =16490418228a(24) =47412092736a(25) =136315920428a(26) =391925964280

External references