38130

Appears in sequences

• Numbers n such that sum of distinct primes dividing n is divisible by the largest prime dividing n. Also n is neither a prime, nor a true power of prime and n is squarefree. Squarefree solutions of A071140.at n=34A071141
• Numbers n such that sum of distinct primes dividing n is divisible by the largest prime dividing n. Also n has exactly 5 distinct prime factors and n is squarefree.at n=9A071144
• Squarefree numbers k such that the largest prime factor of k is equal to the sum of the other prime factors of k.at n=33A071312
• Edge-rooted tree-like octagonal systems (see the Cyvin et al. reference for precise definition).at n=6A121113
• Numbers k such that k*(k+1)-1 and k*(k+1)+1 are twin primes and k*(k+3)-1 and k*(k+3)+1 are also twin primes.at n=20A138303
• Generating function f(x)=(x+(x+(x+(x+(x+...)^5)^4)^3)^2)^1 is the limit as n->infinity of (f_1(x)=x, f_2(x)=x+x^2, f_3(x)=x+(x+x^3)^2, f_4(x)=x+(x+(x+x^4)^3)^2, ...).at n=29A276436
• Number of 6-cycles in the n-triangular honeycomb queen graph.at n=5A289707
• Total sum of the hook lengths over all partitions of 2n-1 having exactly n parts.at n=15A301499
• Numbers k such that omega(k) = 5 and the largest prime factor of k equals the sum of its remaining distinct prime factors, where omega(k) = A001221(k).at n=23A383729