Number of n X 2 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

A280474

Number of n X 2 0..2 arrays with no element unequal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Terms

    a(0) =1a(1) =6a(2) =30a(3) =158a(4) =846a(5) =4446a(6) =22734a(7) =113310a(8) =552654a(9) =2647390a(10) =12492366a(11) =58202526a(12) =268228430a(13) =1224529758a(14) =5544352206a(15) =24921415326a(16) =111297979854a(17) =494186360670

External references