238464

Appears in sequences

• Composite numbers such that sum_{i=1..k} (p_i/(p_i+1))/product_{i=1..k} (p_i/(p_i+1)) is an integer, where p_i are the k prime factors of n (with multiplicity).at n=37A227248
• Number of cyclic arrangements (up to direction) of numbers 1,2,...,n such that any two neighbors are coprime.at n=12A242529
• a(n) is the number of graceful graphs with n edges and round(sqrt(3n+9/4)) vertices.at n=24A343296