cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A173165 Numbers k such that 2*k^2 -+ 1 is a twin prime pair.

This page as a plain text file.
%I A173165 #10 Dec 20 2019 11:15:57
%S A173165 3,6,21,24,36,42,45,87,102,132,153,186,204,228,237,273,297,300,321,
%T A173165 375,426,441,468,486,489,519,570,606,636,693,735,756,759,792,885,918,
%U A173165 951,990,993,1065,1098,1128,1131,1158,1191,1326,1344,1359,1386,1407,1443
%N A173165 Numbers k such that 2*k^2 -+ 1 is a twin prime pair.
%C A173165 A001105(k+1) -+ 1 is a twin prime pair.
%H A173165 Amiram Eldar, <a href="/A173165/b173165.txt">Table of n, a(n) for n = 1..10000</a>
%F A173165 a(n) = 3*A037073(n) = A154670(n)/6.
%t A173165 Select[Range[1500], And @@ PrimeQ[2*#^2 + {-1, 1}] &] (* _Amiram Eldar_, Dec 20 2019 *)
%Y A173165 Cf. A001105, A014574, A037073, A154670.
%K A173165 nonn
%O A173165 1,1
%A A173165 _Juri-Stepan Gerasimov_, Feb 11 2010
%E A173165 Entries checked by _R. J. Mathar_, Mar 09 2010