28909

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 91.at n=18A020430
• Primes that are palindromic in base 11.at n=35A029978
• Primes arising in A053782.at n=27A053872
• Greatest prime factor of prime(n+1)^2 + prime(n)^2.at n=38A069485
• Average of squares of successive primes: a(n) = (prime(n+1)^2 + prime(n)^2)/2, with n >= 2.at n=37A075892
• Primes of form (prime(n)^2 + prime(n+1)^2)/2.at n=7A093343
• Primes of the form k^2 + 9.at n=21A138353
• G.f.: A(x) = exp( Sum_{n>=1} A179305(n)*x^n/n ), where A179305(n) = Sum_{d|n} C(n,d)*sigma(d).at n=15A179304
• Primes p of the form penta(n)-3, where penta(n) is the n-th pentagonal number.at n=33A232537
• Centered 11-gonal (or hendecagonal) primes.at n=13A262344
• Values of n such that n^2 + 5 is a triangular number (A000217).at n=11A276599
• Primes having only {0, 2, 8, 9} as digits.at n=30A386055
• Prime numbersat n=3147