Number of nX2 0..3 arrays with no element less than a strict majority of its horizontal and vertical neighbors.
A231741
Number of nX2 0..3 arrays with no element less than a strict majority of its horizontal and vertical neighbors.
Terms
- a(0) =4a(1) =84a(2) =318a(3) =1328a(4) =6064a(5) =26918a(6) =116909a(7) =511264a(8) =2248196a(9) =9868600a(10) =43259517a(11) =189716276a(12) =832295019a(13) =3650903623a(14) =16013507645a(15) =70240174360a(16) =308101760364
External references
- oeis: A231741