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A103753 Numbers k such that the string 235711k is prime. 0
9, 27, 39, 43, 73, 79, 109, 117, 129, 187, 213, 219, 241, 243, 247, 253, 297, 319, 327, 331, 361, 367, 369, 387, 417, 433, 447, 457, 471, 493, 513, 523, 537, 547, 577, 591, 601, 621, 633, 639, 643, 661, 699, 703, 709, 717, 727, 757, 759 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..49.

EXAMPLE

k=9 is in the sequence because 235711k = 2357119 is a prime number.

k=79 is in the sequence because 235711k = 23571179 is a prime number.

k=187 is in the sequence because 235711k = 235711187 is a prime number.

PROG

(MAGMA) [ n: n in [1..1750] | IsPrime(Seqint(Intseq(n) cat [1, 1, 7, 5, 3, 2])) ]; // Vincenzo Librandi, Feb 02 2011

CROSSREFS

Cf. A103630, A103629, A103590, A103540, A099192.

Sequence in context: A216168 A036303 A116455 * A238333 A103965 A069069

Adjacent sequences:  A103750 A103751 A103752 * A103754 A103755 A103756

KEYWORD

base,nonn

AUTHOR

Parthasarathy Nambi, Mar 28 2005

STATUS

approved

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Last modified June 16 14:56 EDT 2019. Contains 324152 sequences. (Running on oeis4.)