1/16 the number of (n+1) X 4 binary arrays with no 2 X 2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
A183805
1/16 the number of (n+1) X 4 binary arrays with no 2 X 2 subblock being a reflection across the shared element pair of any horizontal or vertical neighbor.
Terms
- a(0) =9a(1) =55a(2) =322a(3) =1953a(4) =11619a(5) =70044a(6) =418925a(7) =2518389a(8) =15091626a(9) =90619253a(10) =543451183a(11) =3261698460a(12) =19566441353a(13) =117412757177a(14) =704423288546
External references
- oeis: A183805