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 A068856 #9 Aug 23 2020 02:09:26 %S A068856 905,1208,2134,3109,8294,12482,12917,15744,16047,16543,19353,19871, %T A068856 19893,19915,19937,20499,29073,37239,37261,37283,38534,39333,39355, %U A068856 40931,40953,43328,49031,59230,64823,67005,67027,71628,71650,72234,81326,82213,82406,82428 %N A068856 First of three consecutive Ulam numbers (A002858) in arithmetic progression with difference 22. %C A068856 Numbers k such that A002858(k+2)-A002858(k+1) = A002858(k+1)-A002858(k) = 22. Sequence gives A002858(k). %C A068856 A002858(1587+k) = 19871 + 22*k (0<=k<=5). !! %H A068856 Amiram Eldar, <a href="/A068856/b068856.txt">Table of n, a(n) for n = 1..10000</a> %Y A068856 Cf. A002858. %K A068856 nonn %O A068856 1,1 %A A068856 _Naohiro Nomoto_, Mar 29 2002 %E A068856 More terms from Larry Reeves (larryr(AT)acm.org), Oct 10 2003 %E A068856 More terms from _Amiram Eldar_, Aug 23 2020