41273

Appears in sequences

• Numerator of b(n) = Sum_{k'<=n} 1/k', where k' denotes the squarefree numbers.at n=14A072980
• Numerator of b(n) = Sum_{k'<=n} 1/k', where k' denotes the squarefree numbers.at n=15A072980
• 1, followed by list of numbers n such that the number of strong primes and the number of weak primes are equal at the n-th prime.at n=14A175102
• Breadth-first reading of the subtree rooted at 7 of the tree where each parent node is the arithmetic derivative (A003415) of all its children.at n=40A327977
• Number of compositions (ordered partitions) of n into distinct parts >= 4.at n=48A339102
• a(n) is the numerator of the sum of the reciprocals of the first n squarefree numbers.at n=10A354417