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A174189 Numbers k such that A000040(k) +/- A163300(k) are both prime. 0

%I

%S 1,7,9,12,24,30,36,63,90,102,117,126,135,150,156,165,171,180,183,225,

%T 234,270,285,369,390,399,402,447,456,501,507,537,570,582,624,627,642,

%U 651,654,660,720,735,762,777,855,864,870,885,930,936,945

%N Numbers k such that A000040(k) +/- A163300(k) are both prime.

%F a(n) = A112529(n-1) for n >= 2. - _Georg Fischer_, Oct 24 2018

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

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

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

%Y Cf. A000040, A112529, A163300.

%K nonn

%O 1,2

%A _Juri-Stepan Gerasimov_, Mar 11 2010

%E Corrected (11 replaced by 12, 128 replaced by 126) and extended by _R. J. Mathar_, Apr 16 2010

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Last modified August 24 03:20 EDT 2019. Contains 326260 sequences. (Running on oeis4.)