Found 3 DodecaProths for n=51
Code:
145174433549145 51 is OctoProth! ... and DodecaProth!!
246834311745945 51 is OctoProth! ... and DodecaProth!!
868049887559295 51 is OctoProth! ... and DodecaProth!!
No more legs neither to the left (n=50) nor to the right (n=54).