Half the number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock diagonal sum differing from its antidiagonal sum by more than 3.
A184224
Half the number of (n+1) X 3 0..3 arrays with every 2 X 2 subblock diagonal sum differing from its antidiagonal sum by more than 3.
Terms
- a(0) =57a(1) =411a(2) =2318a(3) =14641a(4) =88103a(5) =541936a(6) =3302001a(7) =20204829a(8) =123402988a(9) =754319381a(10) =4609217629a(11) =28168842830a(12) =172139309061
External references
- oeis: A184224