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 A051891 #12 Oct 14 2021 18:11:59 %S A051891 2,3,6,10,15,51,175,261,285,286,331,546,745,1135,1171,1275,1330,1365, %T A051891 1366,2025,2640,3180,3436,3780,4116,4861,5860,5890,6036,6670,8646, %U A051891 8961,8980,9715,9945,10116,10180,15771,16590,16876,19326,20215,20266,21451 %N A051891 Values of m, the main key or generating number for Pythagorean triangles in which S (the odd short leg) and U (the hypotenuse) are twin primes. %H A051891 Robert Simms, <a href="https://web.archive.org/web/20080622012348/http://www.math.clemson.edu/~simms/neat/math/pyth/">Deriving Pythagorean Triples</a> (web archive) %F A051891 a(n) = (A051642(n) + 1) / 2. - _Sean A. Irvine_, Oct 12 2021 %Y A051891 Cf. A051892. See A051642 for the S's, A051859 for the U's and A051858 for the T's (the even long leg). %K A051891 nonn %O A051891 1,1 %A A051891 Stuart M. Ellerstein (ellerstein(AT)aol.com), Dec 17 1999 %E A051891 More terms from _Joshua Zucker_, May 12 2006