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 A309385 #12 Jul 30 2019 21:07:31 %S A309385 6672898,6689728,7266898,7289668,8966728,8972668,23667289,23668972, %T A309385 23726689,23728966,23896672,23897266,26667288,26668872,26726688, %U A309385 26728866,26886672,26887266,29367289,29368972,29667287,29668772,29723689,29726687,29728766,29728936,29728993,29729389,29876672,29877266,29893672,29897236,29897293,29899372,29937289,29938972 %N A309385 Numbers which converge to 24547284284866560000000000 under repeated application of the powertrain map of A133500. %H A309385 Martin Renner, <a href="/A309385/b309385.txt">Table of n, a(n) for n = 1..702</a> %e A309385 6672898 -> 6^6*7^2*8^9*8 = 2454728428486656 -> 2^4*5^4*7^2*8^4*2^8*4^8*6^6*5^6 = 24547284284866560000000000. %Y A309385 Cf. A133500, A135384, A135385, A326733, A326734, A326735, A326736, A326737, A326738, A326739, A326740, A326741, A326742. %K A309385 nonn,base %O A309385 1,1 %A A309385 _Martin Renner_, Jul 27 2019