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 A084704 Smallest prime p > prime(n) such that (p + prime(n))/2 is prime. 8
 7, 17, 19, 23, 61, 29, 43, 59, 53, 43, 97, 53, 79, 59, 89, 83, 73, 79, 107, 181, 127, 131, 113, 109, 113, 151, 167, 193, 149, 151, 167, 197, 163, 197, 163, 229, 199, 179, 281, 347, 241, 263, 229, 257, 223, 271, 331, 239, 313, 269, 263, 313, 263, 269, 359, 293 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 COMMENTS Subsidiary sequences: (1) Sequence of primes for a given prime p such that (p+q)/2 is a prime iff q belongs to this sequence. For example, for p = 5 the sequence is 17, 29, 41, 53, 89,... Note that actually a(n) > prime(n+1) in all cases - because there is no prime between prime(n) and prime(n+1). - Zak Seidov, Jul 24 2013. For n>2, a(n)-prime(n) is a multiple of 12. - Zak Seidov, Oct 15 2015 [Proof: the sequence searches prime triples prime(n)

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Last modified January 31 11:53 EST 2023. Contains 359971 sequences. (Running on oeis4.)