Number of n X 1 0..3 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X 2 0..3 array without adjacent equal elements in the latter.

A229314

Number of n X 1 0..3 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1) X 2 0..3 array without adjacent equal elements in the latter.

Terms

    a(0) =4a(1) =14a(2) =50a(3) =176a(4) =622a(5) =2196a(6) =7756a(7) =27390a(8) =96730a(9) =341606a(10) =1206400a(11) =4260462a(12) =15046040a(13) =53135856a(14) =187651986a(15) =662702554a(16) =2340367858a(17) =8265128408a(18) =29188722358a(19) =103081461140a(20) =364037435444

External references