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 A064227 #28 Jul 05 2025 16:30:18 %S A064227 0,1,4,131,99734,181653,328002,325374625245,394178473633984 %N A064227 From Recamán's sequence (A005132): record values in A057167. %C A064227 Let R(n) = n-th term of Recamán's sequence (A005132); consider values of R(n) that take a record number of steps to appear (A064228); sequence gives corresponding values of n. %H A064227 N. J. A. Sloane, <a href="http://neilsloane.com/doc/sg.txt">My favorite integer sequences</a>, in Sequences and their Applications (Proceedings of SETA '98). %H A064227 N. J. A. Sloane, <a href="/A005132/a005132.txt">FORTRAN program for A005132, A057167, A064227, A064228</a> %H A064227 <a href="/index/Rea#Recaman">Index entries for sequences related to Recamán's sequence</a> %Y A064227 Cf. A005132, A057167, A064228. %K A064227 nonn,nice,hard,more %O A064227 1,3 %A A064227 _N. J. A. Sloane_, Sep 22 2001 %E A064227 a(8)-a(9) from _Allan Wilks_, Nov 06 2001 %E A064227 a(10) > 10^25. - _Benjamin Chaffin_, Jun 13 2006 %E A064227 a(10) > 4.28*10^73. - _Benjamin Chaffin_, Mar 22 2010 %E A064227 a(10) > 10^230. - _Benjamin Chaffin_, 2018 %E A064227 Initial term 0 added by _N. J. A. Sloane_, Feb 26 2023