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A055783 Primes q of form q=10p+7, where p is also prime. 3
37, 137, 197, 317, 617, 677, 797, 977, 1097, 1277, 1637, 1997, 2237, 2297, 2417, 2777, 2837, 3137, 3677, 3797, 4217, 4337, 4397, 4637, 4877, 5237, 5417, 5477, 5717, 6197, 6317, 6737, 6917, 7517, 7577, 7877, 8117, 8237, 8297, 8537, 8597, 8837, 9377 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..43.

EXAMPLE

5417=541*10+7, 7 is concatenated to end of 541.

MATHEMATICA

Select[(10#+7)&/@Prime[Range[200]], PrimeQ] (* Harvey P. Dale, Nov 20 2010 *)

CROSSREFS

Cf. A005384, A005385.

Sequence in context: A139734 A142388 A117504 * A044369 A044750 A141936

Adjacent sequences:  A055780 A055781 A055782 * A055784 A055785 A055786

KEYWORD

nonn

AUTHOR

Labos Elemer, Jul 13 2000

STATUS

approved

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Last modified November 20 12:13 EST 2019. Contains 329335 sequences. (Running on oeis4.)