login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A174189 Numbers k such that A000040(k) +/- A163300(k) are both prime. 0
1, 7, 9, 12, 24, 30, 36, 63, 90, 102, 117, 126, 135, 150, 156, 165, 171, 180, 183, 225, 234, 270, 285, 369, 390, 399, 402, 447, 456, 501, 507, 537, 570, 582, 624, 627, 642, 651, 654, 660, 720, 735, 762, 777, 855, 864, 870, 885, 930, 936, 945 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..51.

FORMULA

a(n) = A112529(n-1) for n >= 2. - Georg Fischer, Oct 24 2018

EXAMPLE

a(1) = 1 because 2-0 = 2 is prime, and 2+0 = 2 is prime.

a(2) = 7 because 17-14 = 3 is prime, and 17+14 = 31 is prime.

a(3) = 9 because 23-18 = 5 is prime, and 23+18 = 41 is prime.

CROSSREFS

Cf. A000040, A112529, A163300.

Sequence in context: A020720 A048589 A121056 * A112529 A161892 A056528

Adjacent sequences:  A174186 A174187 A174188 * A174190 A174191 A174192

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Mar 11 2010

EXTENSIONS

Corrected (11 replaced by 12, 128 replaced by 126) and extended by R. J. Mathar, Apr 16 2010

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 21 00:49 EDT 2019. Contains 325189 sequences. (Running on oeis4.)