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 A139794 #10 Nov 11 2020 03:08:17 %S A139794 3,4,5,5,12,13,8,15,17,20,21,29,12,35,37,9,40,41,28,45,53,11,60,61,48, %T A139794 55,73,39,80,89,65,72,97,20,99,101,60,91,109,15,112,113,88,105,137,51, %U A139794 140,149,85,132,157,52,165,173,19,180,181,95,168,193,28,195,197,60,221 %N A139794 Interleaved reading of catheti and hypotenuses of Gaussian triangles with prime number hypotenuse. %F A139794 a(3n+1)= A002366(n). a(3n+2)=A002365(n). a(3n+3)=A002144(n). %K A139794 nonn,less %O A139794 1,1 %A A139794 _Juri-Stepan Gerasimov_, Jun 13 2008 %E A139794 Edited by _R. J. Mathar_, Jun 15 2008