Number of (n+1) X 4 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock unequal to the number of counterclockwise edge increases.
A205818
Number of (n+1) X 4 0..2 arrays with the number of clockwise edge increases in every 2 X 2 subblock unequal to the number of counterclockwise edge increases.
Terms
- a(0) =180a(1) =714a(2) =2880a(3) =12318a(4) =53100a(5) =230532a(6) =1002240a(7) =4361064a(8) =18980472a(9) =82617132a(10) =359622708a(11) =1565418528a(12) =6814215036a(13) =29662110636a(14) =129118523304a(15) =562050276348
External references
- oeis: A205818