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 A144542 #22 Jan 08 2025 10:28:14
%S A144542 6,3,3,2,0,5,7,6,5,7,7,3,2,8,2,3,0,7,7,6,2,8,8,0,4,8,1,7,3,0,6,3,9,8,
%T A144542 8,4,0,5,3,2,9,9,2,3,4,6,7,4,1,4,3,4,5,6,1,2,6,1,4,1,8,3,1,7,0,3,9,9,
%U A144542 1,3,6,2,4,8,0,5,0,9,3,7,8,7,0,4,2,2,8,3,5,1,3,3,9,8,0,5,6,2,4,7,8,7,3,4,7
%N A144542 Unique sequence of digits a(0), a(1), a(2), .. such that for all k >= 2, the number A(k) := Sum_{n = 0..k-1 } a(n)*10^n satisfies 14^A(k) == A(k) mod 10^k.
%D A144542 M. Ripà, La strana coda della serie n^n^...^n, Trento, UNI Service, Nov 2011, p. 69-78. ISBN 978-88-6178-789-6.
%D A144542 Ilan Vardi, "Computational Recreations in Mathematica," Addison-Wesley Publishing Co., Redwood City, CA, 1991, pages 226-229.
%H A144542 Robert G. Wilson v, <a href="/A144542/b144542.txt">Table of n, a(n) for n = 0..1024</a>
%H A144542 J. Jimenez Urroz and J. Luis A. Yebra, <a href="http://www.cs.uwaterloo.ca/journals/JIS/VOL12/Yebra/yebra4.html">On the equation a^x == x (mod b^n)</a>, J. Int. Seq. 12 (2009) #09.8.8
%e A144542 633205765773282307762880481730639884053299234674143456126141831703991362480509...
%t A144542 (* Import Mmca coding for "SuperPowerMod" and "LogStar" from text file in A133612 and then *) $RecursionLimit = 2^14; f[n_] := SuperPowerMod[14, n + 1, 10^n]; Reverse@ IntegerDigits@ f@ 105 (* _Robert G. Wilson v_, Mar 06 2014 *)
%Y A144542 Cf. A133612, A133613, A133614, A133615, A133616, A133617, A133618, A133619, A144539, A144540, A144541, A144543, A144544.
%K A144542 nonn,base
%O A144542 0,1
%A A144542 _N. J. A. Sloane_, Dec 20 2008
%E A144542 a(68) onward from _Robert G. Wilson v_, Mar 06 2014