28349

Properties

Appears in sequences

• Smaller of twin prime pairs in consecutively larger seas of composite numbers.at n=31A046928
• Smaller of twin primes whose middle term is a multiple of A002110(4)=210.at n=22A060230
• Primes p such that 7 is the largest of all prime factors of the numbers between p and the next prime (cf. A052248).at n=19A080186
• Smallest member of a pair of consecutive twin prime pairs that have three primes between them.at n=35A089635
• Primes of the form 14 n^2-1.at n=12A143832
• Initial members of prime triples p < q < r such that r-q = n*(q-p).at n=17A181994
• a(1) = 2. For n > 1, a(n) is the least prime > a(n-1)*n/2.at n=9A190197
• Primes p such that 2*p^3 + 1 and 2*p^3 + 3 are also primes.at n=20A252042
• Lesser of lonely twin primes pairs with increasing distance to nearest prime.at n=9A262936
• a(n) is the least prime p such that the second forward difference of three consecutive primes p, q and r is n = (p - 2q + r)/2.at n=17A316791
• Let P1>3, P2, P3, P4 be 4 consecutive primes with P3-P2 = 2. a(n) = P2 is the earliest occurrence of the 4-tuple with min(P2-P1, P4-P3) = 2*n, or 0 if no such constellation exists.at n=13A347280
• Number of subsets of {1,2,...,n} such that no two elements differ by 2, 4, or 5.at n=28A375983
• Prime numbersat n=3086