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 A058317 #31 Jul 02 2024 20:32:56 %S A058317 0,2,4,5,6,6,7,8,10,10,12,12,14,14,16,16,18,22,20,20,24,26,28,28,30, %T A058317 30,32,31,35,35,39,41,42,45,45,48,48,50,50,50,51,52,54,55,57,58,60,61, %U A058317 64,66,69,71,76,74,77,78,81,82,82,82,84,84,88,89,93,94,97,98,99,100,103 %N A058317 Number of neutrons in atoms of the n-th element of the periodic table (for the most abundant isotope). %H A058317 Y. Bentor, <a href="http://www.chemicalelements.com/show/neutrons.html">Periodic Table: Neutrons</a>, Chemical Elements.com. %H A058317 M. Winter, <a href="http://www.webelements.com/webelements/scholar/index.html">The periodic table of the elements</a>, WebElements. %e A058317 a(79)=118 because the 79th element is gold, whose only naturally occurring isotope is Au-197, which has 79 protons, 79 electrons and 118 neutrons. %Y A058317 Cf. A007656, A058318. %K A058317 nonn,fini %O A058317 1,2 %A A058317 _Labos Elemer_, Dec 12 2000 %E A058317 a(38) updated by _Sean A. Irvine_, Aug 24 2021