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 A127545 #13 Aug 16 2025 12:50:33
%S A127545 42,420,462,882,1050,1092,1302,1428,1722,1932,2142,2268,2310,2688,
%T A127545 2730,3360,3528,3822,4158,4242,4788,5418,5502,5880,6090,6132,6300,
%U A127545 6552,6762,7308,7350,7560,8232,8820,8862,9240,9282,10038,10332,10458,10500,10710
%N A127545 Multiples of 7, k, such that k +/- 1 are twin primes.
%H A127545 Charles R Greathouse IV, <a href="/A127545/b127545.txt">Table of n, a(n) for n = 1..10000</a>
%t A127545 Select[Range[7,10710,7],PrimeQ[#-1]&&PrimeQ[#+1]&] (* _James C. McMahon_, Jan 01 2025 *)
%t A127545 Select[7 Range[2000],AllTrue[#+{1,-1},PrimeQ]&] (* _Harvey P. Dale_, Aug 16 2025 *)
%o A127545 (PARI) a(n) = !(n %7) && isprime(n+1) && isprime(n-1); \\ _Michel Marcus_, Oct 11 2013
%Y A127545 Intersection of A008589 and A014574.
%K A127545 nonn
%O A127545 1,1
%A A127545 _Zak Seidov_, Apr 01 2007
%E A127545 Name edited by _James C. McMahon_, Jan 01 2025