Number of (n+1)X3 0..3 arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant.

A185606

Number of (n+1)X3 0..3 arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant.

Terms

    a(0) =580a(1) =11354a(2) =172026a(3) =3017724a(4) =50646550a(5) =873299900a(6) =14968118872a(7) =257702828288

External references