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 A048455 #6 Oct 14 2019 23:42:34 %S A048455 530,994,1662,2156,2970,3598,4491,5335,6231,7278,8178,9308,10290, %T A048455 11382,12502,13530,14738,15768,16960,18082,19228,20462,21608,22870, %U A048455 24050,25238,26522,27600,29148,30120,32004,32880,34930,35772,37724,38646 %N A048455 Starting from generation 8 add previous and next term yielding generation 9. %Y A048455 Generation 8 is A048454. See A048448-A048466. See also A047844. %K A048455 nonn %O A048455 0,1 %A A048455 _Patrick De Geest_, May 15 1999