Number of (n+1) X (n+1) 0..2 arrays with the upper median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.
A237629
Number of (n+1) X (n+1) 0..2 arrays with the upper median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.
Terms
- a(0) =81a(1) =636a(2) =1310a(3) =2012a(4) =4622a(5) =9368a(6) =18344a(7) =44292a(8) =102536a(9) =211268a(10) =402152a(11) =1015572a(12) =2337608a(13) =4914788a(14) =9150632a(15) =23921652a(16) =54827528a(17) =116999108a(18) =214315112a(19) =574558932a(20) =1312885448a(21) =2831048228a(22) =5126666792a(23) =13988255412a(24) =31897292168a(25) =69273334148
External references
- oeis: A237629