Number of (n+1) X (1+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0101.
A259215
Number of (n+1) X (1+1) 0..1 arrays with each 2 X 2 subblock having clockwise pattern 0000 0011 or 0101.
Terms
- a(0) =7a(1) =13a(2) =24a(3) =45a(4) =85a(5) =162a(6) =311a(7) =601a(8) =1168a(9) =2281a(10) =4473a(11) =8802a(12) =17371a(13) =34365a(14) =68120a(15) =135253a(16) =268909a(17) =535234a(18) =1066287a(19) =2125809a(20) =4240672a(21) =8463633a(22) =16898609a(23) =33750850a(24) =67426675a(25) =134731957a(26) =269267496a(27) =538217181a(28) =1075920133a(29) =2151008226
External references
- oeis: A259215