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 A048458 #9 Jul 03 2017 01:39:35 %S A048458 7,23,67,179,1109,17427659,1586875049,7021048691,1104052140838673681, %T A048458 80729882077782801781,49474191359283212247841, %U A048458 152695677551802424534973144788818335406948326813,50258816309715893690860594601285860231033059311672877749 %N A048458 'Prime last odd terms' from generation 2 onwards. %C A048458 Intersection of A000040 and A048457. %H A048458 Nathaniel Johnston, <a href="/A048458/b048458.txt">Table of n, a(n) for n = 1..20</a> %Y A048458 For "Generations" see A048448-A048455. Cf. A048459. See also A047844. %K A048458 nonn,nice %O A048458 1,1 %A A048458 _Patrick De Geest_, May 15 1999 %E A048458 a(9) - a(13) from _Nathaniel Johnston_, Apr 11 2011