Number of (n+1) X (2+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0101.
A259216
Number of (n+1) X (2+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0101.
Terms
- a(0) =13a(1) =23a(2) =40a(3) =71a(4) =127a(5) =230a(6) =421a(7) =779a(8) =1456a(9) =2747a(10) =5227a(11) =10022a(12) =19345a(13) =37559a(14) =73288a(15) =143615a(16) =282439a(17) =557126a(18) =1101709a(19) =2183123a(20) =4333408a(21) =8613683a(22) =17141395a(23) =34143686a(24) =68062297a(25) =135760415a(26) =270931576a(27) =540909719a(28) =1080276751a(29) =2158057382
External references
- oeis: A259216