55829

Properties

Appears in sequences

• a(n) = ceiling(g(A000073(n))) with g(k) = (k-1)^2/(4k).at n=21A115792
• Number of pentagonal numbers with n digits.at n=9A117712
• Primes dividing terms of A231830.at n=42A362252
• Primes having only {2, 5, 8, 9} as digits.at n=41A386164
• Prime numbersat n=5667