Number of n X 2 0..6 arrays with values 0..6 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.

A198649

Number of n X 2 0..6 arrays with values 0..6 introduced in row major order and each element equal to at least one horizontal or vertical neighbor.

Terms

    a(0) =1a(1) =3a(2) =14a(3) =76a(4) =488a(5) =3521a(6) =28030a(7) =242849a(8) =2264711a(9) =22514016a(10) =236355581a(11) =2595953878a(12) =29564752028a(13) =346348460016

External references