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 A064804 #14 Jul 28 2023 21:40:14
%S A064804 16,22,28,34,38,40,46,52,58,64,68,76,82,86,88,94,98,100,106,112,118,
%T A064804 124,128,130,134,136,142,148,152,154,158,160,166,172,178,184,188,190,
%U A064804 194,196,202,206,208,214,218,220,226,232,236,238,244,248,250,256,262,268
%N A064804 Numbers 2*k such that phi(2*k + 2) < phi(2*k).
%H A064804 Harry J. Smith, <a href="/A064804/b064804.txt">Table of n, a(n) for n = 1..1000</a>
%t A064804 2Select[ Range[200], EulerPhi[2# + 2] < EulerPhi[2# ] & ]
%o A064804 (PARI) { n=e=0; forstep (m=2, 10^9, 2, f=eulerphi(m); if (f<e, write("b064804.txt", n++, " ", m - 2); if (n==1000, return)); e=f ) } \\ _Harry J. Smith_, Sep 26 2009
%Y A064804 Cf. A001837.
%K A064804 easy,nonn
%O A064804 1,1
%A A064804 _Robert G. Wilson v_, Oct 21 2001
%E A064804 a(41)-a(56) from _Harry J. Smith_, Sep 26 2009
%E A064804 Name clarified by _Sean A. Irvine_, Jul 28 2023