Number of 2Xn 0..1 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
A223013
Number of 2Xn 0..1 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.
Terms
- a(0) =2a(1) =4a(2) =7a(3) =18a(4) =41a(5) =119a(6) =295a(7) =825a(8) =2060a(9) =5873a(10) =15234a(11) =42492a(12) =111787a(13) =313666a(14) =836575a(15) =2327389a(16) =6276477a(17) =17477473a(18) =47431027a(19) =131755956a(20) =359950638a(21) =999799707a(22) =2741682652a(23) =7613006585a(24) =20955577878a(25) =58193926348a(26) =160583108286a(27) =446091089120
External references
- oeis: A223013