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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
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
Sequence in context: A020720 A048589 A121056 * A112529 A352876 A161892
KEYWORD
nonn
AUTHOR
EXTENSIONS
Corrected (11 replaced by 12, 128 replaced by 126) and extended by R. J. Mathar, Apr 16 2010
STATUS
approved

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Last modified April 21 19:32 EDT 2024. Contains 371885 sequences. (Running on oeis4.)