57171

Appears in sequences

• Values of x in x^2 - 289 = 2*y^2.at n=14A106527
• Number of distinct values obtained when each of the operators # in the expression 1#2#3#...#n is replaced by + (add) or x (multiply) in all possible ways, for n=1,2,3,...at n=17A138651
• The number of vertices on a vesica piscis formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.at n=17A341878