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 A145987 #16 Dec 18 2022 01:31:23 %S A145987 3,5,7,11,17,29,41,47,53,59,71,83,89,97,113,137,173,179,191,227,239, %T A145987 257,281,317,347,353,359,383,401,431,443,479,491,509,521,557,569,599, %U A145987 617,641,647,653,683,719,743,761,773,809,821,827,863,887,911,929,941,947,953,971,977,983,997 %N A145987 Duplicate of A068811. %K A145987 dead %O A145987 1,1