Number of (n+1) X 2 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to two.
A205829
Number of (n+1) X 2 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock equal to two.
Terms
- a(0) =30a(1) =111a(2) =423a(3) =1611a(4) =6132a(5) =23340a(6) =88839a(7) =338148a(8) =1287093a(9) =4899063a(10) =18647307a(11) =70977258a(12) =270160788a(13) =1028313201a(14) =3914069274a(15) =14898124683a(16) =56706742659a(17) =215842915227a(18) =821563042932
External references
- oeis: A205829