Half the number of (n+1)X3 0..3 arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.
A183973
Half the number of (n+1)X3 0..3 arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.
Terms
- a(0) =992a(1) =13168a(2) =180236a(3) =2735260a(4) =41834260a(5) =664848772a(6) =10590791696a(7) =171342163572
External references
- oeis: A183973