Number of (n+1) X (2+1) 0..1 arrays with every element equal to some horizontal, vertical, diagonal or antidiagonal neighbor, with top left element zero.
A231951
Number of (n+1) X (2+1) 0..1 arrays with every element equal to some horizontal, vertical, diagonal or antidiagonal neighbor, with top left element zero.
Terms
- a(0) =18a(1) =142a(2) =1034a(3) =7756a(4) =58350a(5) =438540a(6) =3295580a(7) =24766738a(8) =186126146a(9) =1398767358a(10) =10511956032a(11) =78999000742a(12) =593689902080
External references
- oeis: A231951