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 A362435 #11 Aug 04 2024 11:16:15 %S A362435 18,25,28,34,35,37,41,44,44,44,44,44,44,44,44,44,44,44,44,44,44,44,44, %T A362435 44,44,44,44,44,44,44,44,44,44,44,44,44,44,44,44,44,44,44,44,44,44,44, %U A362435 44,44,44,44,44,44,44 %N A362435 a(1) = 18; thereafter a(n) = a(n-1) + difference between first two digits of a(n-1). %C A362435 44 is a fixed point. %D A362435 GCHQ, The GCHQ Puzzle Book, Penguin, 2016. See page 36. %H A362435 <a href="/index/Rec#order_01">Index entries for linear recurrences with constant coefficients</a>, signature (1). %F A362435 G.f.: x*(18 + 7*x + 3*x^2 + 6*x^3 + x^4 + 2*x^5 + 4*x^6 + 3*x^7)/(1 - x). - _Elmo R. Oliveira_, Aug 03 2024 %Y A362435 Cf. A006507, A232485. %K A362435 nonn,easy %O A362435 1,1 %A A362435 _N. J. A. Sloane_, Apr 21 2023