1/12 the number of (n+2)X5 0..2 arrays with each 3X3 subblock containing one of one value, three of another, and five of the last.

A184501

1/12 the number of (n+2)X5 0..2 arrays with each 3X3 subblock containing one of one value, three of another, and five of the last.

Terms

    a(0) =6132a(1) =17077a(2) =50590a(3) =161097a(4) =579771a(5) =2185733a(6) =8600335a(7) =36366658a(8) =156863626a(9) =689415818a(10) =3168631633a(11) =14630695130a(12) =67976252871a(13) =325283270950

External references