246046

Appears in sequences

• List of coprime pairs (x,y) such that x^2+y^2 = 13^n with 0<x<y.at n=22A158936
• Values of x such that x^2 + y^2 = 13^n with x and y coprime and 0 < x < y.at n=11A188948
• Even numbers x such that x^2 + y^2 = 13^n with x and y coprime.at n=11A188982
• a(n) = number of subsets of {1, 2, ..., n} that represent the first k divisors of m for some positive integers m and 1 <= k <= A000005(m).at n=43A378314