Number of n X n 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
A280548
Number of n X n 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =0a(1) =0a(2) =50a(3) =382a(4) =1764a(5) =6502a(6) =20334a(7) =56102a(8) =141398a(9) =332810a(10) =743966a(11) =1598198a(12) =3328362a(13) =6763114
External references
- oeis: A280548