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A114227 Smallest odd prime q such that 2q + prime(n) is prime. 17
3, 3, 3, 3, 3, 5, 3, 7, 3, 3, 3, 5, 3, 3, 7, 3, 3, 13, 3, 5, 3, 7, 3, 3, 3, 3, 11, 7, 5, 3, 7, 5, 7, 3, 3, 5, 3, 3, 7, 5, 3, 3, 7, 17, 11, 3, 3, 5, 3, 19, 5, 3, 3, 3, 7, 3, 3, 13, 5, 7, 3, 3, 17, 7, 3, 5, 3, 5, 3, 7, 3, 3, 5, 3, 37, 11, 19, 5, 7, 5, 13, 3, 5, 3, 7, 3, 3, 23, 37, 31, 11, 43, 5, 3, 7, 13, 17 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 3..10000

MATHEMATICA

Table[p1 = Prime[n1]; n2 = 2; p2 = 3; While[ cp = p1 + 2*p2; ! PrimeQ[cp], n2++; p2 = Prime[n2]]; p2, {n1, 3, 202}]

PROG

(Haskell)

a114227 n = head [p | p <- tail a000040_list,

                      a010051' (2 * p + a000040 n) == 1]

-- Reinhard Zumkeller, Oct 29 2013

CROSSREFS

Cf. A000040, A010051, A114228.

Sequence in context: A304431 A147752 A236682 * A187469 A112593 A213809

Adjacent sequences:  A114224 A114225 A114226 * A114228 A114229 A114230

KEYWORD

easy,nonn

AUTHOR

Lei Zhou, Nov 18 2005

STATUS

approved

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Last modified June 22 17:18 EDT 2021. Contains 345388 sequences. (Running on oeis4.)