28547

Properties

Appears in sequences

• Prime Friedman numbers.at n=18A112419
• a(n) is the number of binary strings of length n such that there exists a subsequence of length 4 containing 3 or more ones.at n=14A118646
• Primes p such that q = 4p^2 + 1 and r = 4q^2 + 1 are also prime.at n=36A122424
• Primes of the form k^4-k-1.at n=7A126422
• a(n) = n^4 - n - 1.at n=12A126423
• Primes p such that p+2, n*(p+2)+6 and p*(p+2)+8 are also prime.at n=7A130735
• Indices of primes of the form 2^t*3^u + 1 in the primes.at n=35A174099
• Primes p such that 2p + 3, 4p + 9, 3p + 2 and 9p + 8 are also primes.at n=17A176619
• Primes p such that p+2, p+24 and p+246 are also primes.at n=27A235871
• Initial members of prime quadruples (n, n+2, n+24, n+26).at n=25A245568
• Smallest of 4 consecutive prime numbers that when represented as a simple continued fraction, generates prime numbers in the numerator and denominator, when reduced.at n=22A270884
• Twin primes both of which are the sum of three positive cubes.at n=22A272376
• Primes that can be generated by the concatenation in base 3, in descending order, of two consecutive integers read in base 10.at n=32A287301
• a(n) = a(n-1) + a(n-2) + a([(n-1)/2]), where a(0) = 1, a(1) = 1, a(2) = 1.at n=21A298352
• Primes p*A007953(p)+1 for p in A338976.at n=47A338977
• Discriminants of imaginary quadratic fields with class number 41 (negated).at n=34A351679
• Prime numbersat n=3105