Number of nX4 0..2 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.
A280120
Number of nX4 0..2 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) =28a(2) =168a(3) =1030a(4) =5802a(5) =31608a(6) =171100a(7) =916768a(8) =4882310a(9) =25849910a(10) =136148532a(11) =713757316a(12) =3726366076a(13) =19383636846a(14) =100497836596a(15) =519525218302
External references
- oeis: A280120