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 A046428 #16 Aug 12 2024 13:15:30 %S A046428 78,170,315,316,544,553,579,594,626,675,726,909,940,1056,1088,1090, %T A046428 1107,1118,1178,1210,1260,1349,1382,1482,1580,1585,1616,1617,1620, %U A046428 1645,1647,1746,1824,1872,2033,2145,2188,2195,2201,2211,2225,2250,2338,2349,2365,2378 %N A046428 Numbers requiring 8 steps to reach a prime under the prime factor concatenation procedure. %H A046428 Rémy Sigrist, <a href="/A046428/b046428.txt">Table of n, a(n) for n = 1..1000</a> %H A046428 P. De Geest, <a href="https://www.worldofnumbers.com/topic1.htm">Home Primes</a> %H A046428 Rémy Sigrist, <a href="/A046428/a046428.gp.txt">PARI program for A046428</a> %o A046428 (PARI) \\ See Links section. %Y A046428 Cf. A037271, A046411. %K A046428 nonn,base %O A046428 1,1 %A A046428 _Patrick De Geest_, Jun 15 1998 %E A046428 More terms from _Rémy Sigrist_, May 19 2019