1750326

Appears in sequences

• Arithmetic progressions of at least 4 terms with common difference 6 having the same value of phi(x) start at these numbers.at n=13A050498
• Number of regions formed inside a triangle with edge length 1 by the straight line segments mutually connecting all vertices and points that divide the sides into segments with lengths equal to the Farey series of order n = A006842(n,k)/A006843(n,k), k = 1..A005728(n).at n=9A358948