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 A306365 #16 Feb 19 2019 15:43:06 %S A306365 708,718,723,731,733,743,828,838,843,851,853,863,958,963,983,1078, %T A306365 1083,1103,1203,1299,1309,1332,1342,1347,1350,1355,1357,1359,1367, %U A306365 1419,1429,1452,1462,1467,1475,1477,1479,1487,1499,1539,1582,1607,1619,1659,1702,1707,1727,1739,1779,1827,1859,1923,1933,1956 %N A306365 Trajectory of n under the Reverse and Add! operation carried out in base 5 (presumably) does not reach a palindrome. %C A306365 Base-5 analog of A066059 (base 2), A077404 (base 3), A075420 (base 4) and A023108 (base 10). %C A306365 All terms are tested up to 200 iteration steps, i.e., within 200 steps no palindrome was reached. %H A306365 A.H.M. Smeets, <a href="/A306365/b306365.txt">Table of n, a(n) for n = 1..20000</a> %Y A306365 Cf. A066059, A075420, A077404, A023108. %K A306365 nonn,base %O A306365 1,1 %A A306365 _A.H.M. Smeets_, Feb 10 2019