Number of nX3 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
A280175
Number of nX3 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =0a(1) =12a(2) =60a(3) =279a(4) =1082a(5) =3931a(6) =13720a(7) =46467a(8) =153650a(9) =499289a(10) =1598693a(11) =5059881a(12) =15855622a(13) =49273183a(14) =152010000a(15) =466006394a(16) =1420614227a(17) =4309242893a(18) =13013193556a(19) =39139655092a(20) =117289714264a(21) =350310455965
External references
- oeis: A280175