66821

Properties

Appears in sequences

• Lesser of two consecutive primes such that n*p + q is a perfect square, p < q.at n=14A064545
• Coefficients of a solution to a functional equation.at n=26A092834
• Pell equation solutions (8*a(n))^2 - 65*b(n)^2 = -1 with b(n):=A097736(n), n >= 0.at n=2A097735
• Primes equal to a sum of primes with differences congruent to (2,4) mod 6.at n=29A104160
• Primes of the form p^2 +3p + 1, where p is also a prime.at n=22A165944
• Primes whose base-4 representation also is the base 2-representation of a prime.at n=25A235461
• SanD-68 primes p: such that p+d is also prime and sum of digits A007953(p(p+d)) = d, with d = 68.at n=5A307474
• a(0) = 2; afterwards a(n) is the least prime greater than a(n-1) such that Omega(a(n-1) + a(n)) = n.at n=14A357713
• Prime numbers of the form 3p+8 where p, p+2 and p+6 are prime numbers.at n=28A376013
• Prime numbersat n=6659