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 A072573 #9 Mar 23 2020 04:08:43 %S A072573 205,217,473,515,625,667,803,1003,1207,1243,1313,1465,1505,1517,1537, %T A072573 1681,1715,1795,1817,1895,2075,2105,2191,2303,2405,2453,2585,2627, %U A072573 2783,2933,3055,3073,3175,3197,3265,3337,3353,3505,3565,3665,3937,3995,4085 %N A072573 Odd interprimes not divisible by 3. %H A072573 Amiram Eldar, <a href="/A072573/b072573.txt">Table of n, a(n) for n = 1..10000</a> %t A072573 a = Table[ Prime[n], {n, 2, 600}]; b = {}; Do[d = (a[[n + 1]] - a[[n]])/2; If[ OddQ[ a[[n]] + d] && Mod[d, 3] == 0, b = Append[b, a[[n]] + d]], {n, 1, 598}]; b %Y A072573 Cf. A072569, A072572, A024675. %K A072573 nonn %O A072573 1,1 %A A072573 _Marco Matosic_, Jun 25 2002 %E A072573 Edited by _N. J. A. Sloane_ and _Robert G. Wilson v_, Jun 27 2002