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A092738 Primes of the form prime(x)+prime(x+1)+1. 8

%I #19 Jan 21 2019 19:01:55

%S 13,19,31,37,43,53,61,79,101,113,139,163,173,199,211,223,241,269,277,

%T 331,353,373,397,457,463,509,521,541,577,601,619,631,727,773,787,811,

%U 829,853,883,907,919,947,967,991,1013,1031,1181,1193,1201,1231,1237

%N Primes of the form prime(x)+prime(x+1)+1.

%H Vincenzo Librandi, <a href="/A092738/b092738.txt">Table of n, a(n) for n = 1..1000</a>

%t f[n_] := Prime[n] + Prime[n + 1] + 1; f[ # ] & /@ Select[ Range[120], PrimeQ[ f[ # ]] &] (* _Robert G. Wilson v_, Apr 14 2004 *)

%o (PARI) list(lim)=my(v=List(),p=2,t);forprime(q=3,,t=p+q+1;if(t>lim,return(Vec(v)));if(isprime(t),listput(v,t))) \\ _Charles R Greathouse IV_, Mar 19 2013

%Y Cf. A001043, A072669.

%K nonn,easy

%O 1,1

%A _Jorge Coveiro_, Apr 12 2004

%E More terms from _Robert G. Wilson v_, Apr 14 2004

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Last modified April 25 04:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)