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A156012 Primes p such that 2*p+3 and 32*p+93 are both prime. 1
2, 7, 13, 19, 29, 47, 53, 67, 113, 127, 167, 193, 197, 223, 349, 503, 509, 523, 547, 613, 739, 743, 809, 827, 859, 887, 1033, 1069, 1117, 1327, 1373, 1427, 1429, 1453, 1553, 1607, 1609, 1663, 1693, 1723, 1777, 1847, 2063, 2087, 2099, 2113, 2143, 2203, 2239 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MAPLE
a := proc (n) if isprime(2*ithprime(n)+3) = true and isprime(32*ithprime(n)+93) = true then ithprime(n) else end if end proc: seq(a(n), n = 1 .. 450); # Emeric Deutsch, Mar 01 2009
MATHEMATICA
Select[Prime[Range[2500]], And @@ PrimeQ[{2# + 3, 32# + 93}]&] (* Vincenzo Librandi, Oct 30 2012 *)
PROG
(Magma) [p: p in PrimesUpTo(2500)| IsPrime(2*p + 3) and IsPrime(32*p + 93)]; // Vincenzo Librandi, Oct 30 2012
CROSSREFS
Cf. A156007.
Sequence in context: A138646 A118755 A231383 * A106011 A045375 A249419
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Feb 01 2009
EXTENSIONS
More terms from Emeric Deutsch, Mar 01 2009
STATUS
approved

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Last modified June 16 07:19 EDT 2024. Contains 373423 sequences. (Running on oeis4.)