Number of n X n 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

A281198

Number of n X n 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

Terms

    a(0) =0a(1) =2a(2) =56a(3) =270a(4) =1141a(5) =4248a(6) =14375a(7) =45614a(8) =138676a(9) =409976a(10) =1190740a(11) =3421202a(12) =9767347a(13) =27782656a(14) =78849645

External references