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A055784 Primes q of form q = 10p + 9, where p is also prime. 2
29, 59, 79, 139, 179, 199, 239, 379, 419, 439, 479, 599, 619, 719, 739, 839, 1019, 1039, 1279, 1319, 1399, 1499, 1579, 1979, 1999, 2239, 2339, 2399, 2579, 2699, 2719, 2819, 2939, 3079, 3119, 3319, 3499, 3539, 3739, 4019, 4099, 4219, 4339, 4639, 4679 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..45.

EXAMPLE

5419 = 541*10 + 9, 9 is appended to 541.

MATHEMATICA

Select[10#+9&/@Prime[Range[100]], PrimeQ] (* Harvey P. Dale, Aug 20 2012 *)

CROSSREFS

Cf. A005384, A005385.

Sequence in context: A184073 A080170 A078848 * A083821 A055785 A042666

Adjacent sequences:  A055781 A055782 A055783 * A055785 A055786 A055787

KEYWORD

nonn

AUTHOR

Labos Elemer, Jul 13 2000

STATUS

approved

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Last modified November 11 18:50 EST 2019. Contains 329031 sequences. (Running on oeis4.)