77707

Appears in sequences

• Numbers having four 7's in base 10.at n=21A043520
• a(1)=1, a(n) is the smallest integer > a(n-1) such that the sum of elements of the simple continued fraction for S(n)=1/a(1)+1/a(2)+...+1/a(n) equals n^4.at n=7A071972
• Smallest multiple of n using only digits 0 and 7.at n=16A078246
• a(n) = 4*3^n - 2*2^n - 1.at n=9A135914
• Numbers whose set of base 10 digits is {0,7}.at n=29A204094
• The number of regions formed when every pair of n points, placed at the vertices of a regular n-gon, are connected by a circle and where the points lie at the ends of the circle's diameter.at n=25A358782