Question

How many different ways are there for 15 people to stand in circle? (it's different when at least 1 neighbour(left or right) are different)

Answer 1

assume they are in a straight line, and that the first person is a clone at both ends?

Answer 2

or is a circle any different from a line?

Answer 3

a,b,c,a
a,c,b,a
b,a,c,b
b,c,a,b
c,a,b,c
c,b,a,c

might have some duplicates eh

Answer 4

ive not worked with circles enough to have a solution .... yet