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A108727 Numbers n such that 11*n + 31 is prime. 0
0, 2, 6, 12, 18, 20, 26, 32, 38, 56, 60, 66, 72, 80, 86, 90, 96, 98, 102, 116, 122, 128, 132, 138, 140, 146, 156, 168, 170, 180, 188, 192, 206, 210, 222, 228, 240, 242, 252, 266, 270, 272, 276, 278, 290, 300, 312, 318, 326, 336, 342, 350, 356, 362, 366, 368, 380 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..57.

EXAMPLE

If n=0, then 11*n + 31 = 31 (prime).

If n=56, then 11*n + 31 = 647 (prime).

MAPLE

a:=proc(n) if isprime(11*n+31)=true then n else fi end: seq(a(n), n=0..450); (Deutsch)

MATHEMATICA

Select[Range[0, 400], PrimeQ[11#+31]&] (* Harvey P. Dale, Nov 02 2011 *)

PROG

(PARI) is(n)=isprime(11*n+31) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A108233.

Sequence in context: A154030 A055560 A237719 * A138630 A026229 A259934

Adjacent sequences:  A108724 A108725 A108726 * A108728 A108729 A108730

KEYWORD

nonn,easy

AUTHOR

Parthasarathy Nambi, Jun 21 2005

EXTENSIONS

More terms from Emeric Deutsch, Jun 26 2005

STATUS

approved

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Last modified October 15 16:01 EDT 2018. Contains 316236 sequences. (Running on oeis4.)