Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000011.
A259889
Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00000011.
Terms
- a(0) =215a(1) =653a(2) =3511a(3) =13373a(4) =40435a(5) =151483a(6) =595513a(7) =2101769a(8) =7434765a(9) =27615849a(10) =101238339a(11) =364229615a(12) =1323891453a(13) =4841497755a(14) =17598175493a(15) =63882224753a(16) =232605289739a(17) =846849589145
External references
- oeis: A259889