55339

Properties

Appears in sequences

• a(n) = a(n-1) + a(n-2) + 1, with a(0) = 1 and a(1) = 11.at n=19A022325
• Smallest squarefree integer k such that Q(sqrt(k)) has class number n.at n=32A081363
• Last term of prime quadruples.at n=26A090258
• Primes p such that continued fraction of (1 + sqrt(p))/2 has period 6: primes in A146331.at n=39A146351
• Primes p such that 12*p^3+-1 are twin primes.at n=31A158297
• Ramanujan primes that begin a record gap to the next Ramanujan prime.at n=14A182876
• Ramanujan prime R_k such that pi(R_(k+1)) - pi(R_k) are record values: record Ramanujan prime A190874(k).at n=8A234298
• Prime numbers p such that p - 2, p^2 - p - 1, p^2 - p + 1 are prime numbers.at n=17A274525
• Slowest increasing sequence of primes such that a(n - 1) + a(n) and a(n - 1)^2 + a(n)^2 are both semiprimes, with a(1)=2.at n=35A365050
• a(n) = number of partitions p of n such that the greatest multiplicity of the parts of p is not a part of p.at n=45A365616
• Prime numbersat n=5621