Number of (1+1) X (n+1) 0..1 arrays with every element equal to some horizontal, diagonal or antidiagonal neighbor, with top left element zero.

A232077

Number of (1+1) X (n+1) 0..1 arrays with every element equal to some horizontal, diagonal or antidiagonal neighbor, with top left element zero.

Terms

    a(0) =3a(1) =15a(2) =46a(3) =161a(4) =601a(5) =2208a(6) =8053a(7) =29415a(8) =107534a(9) =393061a(10) =1436589a(11) =5250624a(12) =19190841a(13) =70141747a(14) =256364934a(15) =937002409a(16) =3424702513a(17) =12517136672a(18) =45749581901a(19) =167212702063a(20) =611155044830

External references