124656

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 15.at n=25A031693
• Triangle read by rows: T(n,k) is the number of binary trees (i.e., a rooted tree where each vertex has either 0, 1, or 2 children; and, when only one child is present, it is either a right child or a left child) with n edges and k pairs of adjacent vertices of outdegree 2.at n=34A126219
• Integers that are Rhonda numbers to base 18.at n=28A255735
• Numbers k such that 56*10^k - 3 is prime.at n=23A291608
• a(n) = Sum_{k=1..n} k * lcm(k,n).at n=27A344508