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.
%I A172367 #32 Oct 21 2021 01:33:50
%S A172367 1,3,7,9,13,15,19,25,27,33,37,39,43,49,55,57,63,67,69,75,79,85,93,97,
%T A172367 99,103,105,109,123,127,133,135,145,147,153,159,163,169,175,177,187,
%U A172367 189,193,195,207,219,223,225,229,235,237,247,253,259,265,267,273,277,279
%N A172367 Numbers k > 0 such that k+4 is a prime.
%C A172367 The subsequence of primes A023200 consists of the smallest primes p of cousin prime pairs (p, p+4), while the subsequence of nonprimes is A164384. - _Bernard Schott_, Oct 19 2021
%H A172367 Sameen Ahmed Khan, <a href="/A172367/b172367.txt">Table of n, a(n) for n = 1..10000</a>
%H A172367 Sameen Ahmed Khan, <a href="http://arxiv.org/abs/1203.2083">Primes in Geometric-Arithmetic Progression</a>, arXiv:1203.2083v1 [math.NT], (Mar 09 2012).
%F A172367 a(n) = prime(n+2) - 4.
%e A172367 a(1) = 5 - 4 = 1, a(2) = 7 - 4 = 3.
%t A172367 Table[Prime[n]-4,{n,3,53}] (* _Charles R Greathouse IV_, Mar 12 2012 *)
%o A172367 (PARI) a(n)=prime(n+2)-4 \\ _Charles R Greathouse IV_, Mar 12 2012
%Y A172367 Union of A023200 and A164384.
%Y A172367 Cf. A000040, A006093, A040976, A086801.
%K A172367 nonn,easy
%O A172367 1,2
%A A172367 _Juri-Stepan Gerasimov_, Feb 01 2010