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 A248523 #22 Feb 16 2025 08:33:23 %S A248523 5,137,1787,1997,2237,2657,3527,4127,4337,4787,8087,12107,13757,14447, %T A248523 17987,19697,21377,23057,23687,31247,32297,34157,34367,35447,37547, %U A248523 38567,39227,43397,48677,51197,51827,53087,58907,65027,65837 %N A248523 Initial members of prime quadruples (n, n+2, n+144, n+146). %C A248523 This sequence is prime n, where there exist two twin prime pairs of (n,n+2), (n+144,n+146). %C A248523 Excluding 5, this is a subsequence of each of the following: A128468 (a(n)=30*n+17), A039949 (Primes of the form 30n-13), A181605 (twin primes ending in 7). %H A248523 Karl V. Keller, Jr., <a href="/A248523/b248523.txt">Table of n, a(n) for n = 1..100000</a> %H A248523 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PrimeQuadruplet.html">Prime Quadruplet.</a> %H A248523 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TwinPrimes.html">Twin Primes</a> %H A248523 Wikipedia, <a href="http://www.wikipedia.org/wiki/Twin_prime">Twin prime</a> %e A248523 For n=137, the numbers 137, 139, 281, 283, are primes. %o A248523 (Python) %o A248523 from sympy import isprime %o A248523 for n in range(1,10000001,2): %o A248523 if isprime(n) and isprime(n+2) and isprime(n+144) and isprime(n+146): print(n,end=', ') %Y A248523 Cf. A077800 (twin primes), A128468, A039949, A181605. %K A248523 nonn %O A248523 1,1 %A A248523 _Karl V. Keller, Jr._, Jan 11 2015