Number of (n+1) X (2+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0001 0101 or 0111.
A259291
Number of (n+1) X (2+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0001 0101 or 0111.
Terms
- a(0) =26a(1) =94a(2) =322a(3) =1134a(4) =3938a(5) =13774a(6) =48002a(7) =167598a(8) =584610a(9) =2040206a(10) =7118274a(11) =24838766a(12) =86667746a(13) =302412110a(14) =1055197186a(15) =3681898030a(16) =12847185954a(17) =44827572494a(18) =156416277058a(19) =545781633518
External references
- oeis: A259291