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A166457 Numbers n such that n*100+1 is prime. 1
1, 4, 6, 7, 12, 13, 16, 18, 19, 28, 30, 33, 37, 40, 42, 48, 51, 55, 57, 58, 61, 63, 67, 70, 79, 81, 85, 90, 96, 99, 103, 105, 106, 117, 118, 121, 123, 124, 126, 130, 139, 144, 151, 154, 156, 159, 160, 163, 169, 174, 183, 184, 187, 190, 193, 195, 198, 201, 202, 210, 211 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000

EXAMPLE

a(1)=1 (1*100+1=prime); a(2)=4 (4*100+1=prime).

MAPLE

a := proc (n) if isprime(100*n+1) then n else end if end proc: seq(a(n), n = 1 .. 250); # Emeric Deutsch, Nov 01 2009

MATHEMATICA

Select[If[PrimeQ[100*# + 1], #] & /@ Range[2*8!], IntegerQ] (* G. C. Greubel, May 15 2016 *)

PROG

(PARI) is(n)=isprime(n*100+1) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Cf. A000040, A086304.

Sequence in context: A303263 A056853 A024566 * A047506 A310656 A102136

Adjacent sequences:  A166454 A166455 A166456 * A166458 A166459 A166460

KEYWORD

nonn,easy

AUTHOR

Juri-Stepan Gerasimov, Oct 14 2009

EXTENSIONS

Extended by Emeric Deutsch, Nov 01 2009

STATUS

approved

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Last modified July 24 05:21 EDT 2019. Contains 325290 sequences. (Running on oeis4.)