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A108854 Numbers n such that 10*n - 127 is prime. 0
13, 14, 15, 17, 18, 20, 21, 23, 24, 29, 30, 32, 35, 36, 39, 41, 42, 44, 48, 50, 51, 56, 57, 59, 63, 65, 69, 72, 74, 77, 78, 80, 81, 86, 87, 90, 95, 98, 99, 101, 108, 111, 114, 116, 119, 122, 123, 125, 128, 129, 132, 134, 135, 141, 143, 150, 155, 156, 158, 161, 162 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..61.

EXAMPLE

If n=13 then 10*n - 127 = 3 (prime).

If n=39 then 10*n - 127 = 263 (prime).

MAPLE

a:=proc(n) if isprime(10*n-127)=true then n else fi end: seq(a(n), n=0..200); # Emeric Deutsch, Jul 18 2005

MATHEMATICA

Select[Range[13, 200], PrimeQ[10#-127]&] (* Harvey P. Dale, Aug 22 2021 *)

PROG

(PARI) is(n)=isprime(10*n-127) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A138596 A293831 A118140 * A106007 A048037 A346657

Adjacent sequences: A108851 A108852 A108853 * A108855 A108856 A108857

KEYWORD

nonn,easy

AUTHOR

Parthasarathy Nambi, Jul 11 2005

EXTENSIONS

More terms from Emeric Deutsch, Jul 18 2005

STATUS

approved

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Last modified December 5 01:43 EST 2022. Contains 358572 sequences. (Running on oeis4.)