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A116615 Values of n such that prime(2n) mod 12 = 7. 2

%I #19 Nov 20 2017 05:31:59

%S 2,4,7,11,17,18,19,23,24,29,45,57,69,94,101,105,111,112,116,121,129,

%T 133,136,137,138,141,150,157,162,164,170,172,174,177,184,187,197,203,

%U 207,209,220,231,235,239,245,250,251,252,254,255,260,261,270,273,276,283

%N Values of n such that prime(2n) mod 12 = 7.

%H G. C. Greubel, <a href="/A116615/b116615.txt">Table of n, a(n) for n = 1..1000</a>

%F Equals (1/2) * { even terms in A160592 = A000720(A068229) }. - _M. F. Hasler_, May 22 2009

%e 23 is in the sequence because the 46th prime is 199 and 199 mod 12=7.

%p a:=proc(n) if ithprime(2*n) mod 12 = 7 then n else fi end: seq(a(n),n=1..300);

%t Select[Range[1, 500], Mod[Prime[2*#], 12] == 7 &] (* _G. C. Greubel_, Nov 19 2017 *)

%o (PARI) for( n=1,999, prime(2*n)%12==7 & print1(n",")) \\ _M. F. Hasler_, May 22 2009

%Y Cf. A116602, A116610, A116612-A116617, A160591-A160594. [_M. F. Hasler_, May 22 2009]

%K nonn

%O 1,1

%A _Roger L. Bagula_, Mar 29 2006

%E Edited by _N. J. A. Sloane_, Apr 05 2006

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Last modified April 23 12:27 EDT 2024. Contains 371912 sequences. (Running on oeis4.)