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 A233589 #35 Oct 24 2024 06:36:54 %S A233589 1,6,9,8,8,0,4,7,6,7,6,7,0,0,0,7,2,1,1,9,5,2,6,9,0,1,1,5,9,1,4,6,4,0, %T A233589 4,3,2,5,5,9,7,3,0,9,3,6,6,4,9,8,3,9,6,9,7,8,1,7,4,1,9,1,7,4,2,6,8,9, %U A233589 2,0,0,0 %N A233589 Decimal expansion of the continued fraction c(1) +c(1)/(c(2) +c(2)/(c(3) +c(3)/(c(4) +c(4)/....))), where c(i)=(i-1)!. %H A233589 Stanislav Sykora, <a href="/A233589/b233589.txt">Table of n, a(n) for n = 1..20000</a> (terms 6942..20000 corrected by Amiram Eldar) %H A233589 Stanislav Sykora, <a href="http://dx.doi.org/10.3247/sl4math13.001">Blazys' Expansions and Continued Fractions</a>, Stans Library, Vol.IV, 2013, DOI 10.3247/sl4math13.001 %H A233589 Stanislav Sykora, <a href="http://oeis.org/wiki/File:BlazysExpansions.txt">PARI/GP scripts for Blazys expansions and fractions</a>, OEIS Wiki. %F A233589 Equals 0!+0!/(1!+1!/(2!+2!/(3!+3!/(4!+...)))). %F A233589 Equals simple continued fraction [0!!; 1!!, 2!!, 3!!, ..., n!!, ...] where the double factorial n!! = A006882(n). - _Thomas Ordowski_, Oct 21 2024 %e A233589 1.69880476767000721195269011591464043255973093664983969781741917426892... %t A233589 RealDigits[ Fold[(#2 + #2/#1) &, 1, Reverse@ Range[0, 18]!], 10, 111][[1]] (* _Robert G. Wilson v_, May 22 2014 *) %o A233589 (PARI) See the link. %Y A233589 Cf. A233588. %Y A233589 Cf. A000142 (factorials), A006882 (double factorials). %Y A233589 Cf. Blazys' continued fractions: A233588, A233590, A233591 and Blazys' expansions: A233582, A233583, A233584, A233585, A233586, A233587. %K A233589 cons,nonn %O A233589 1,2 %A A233589 _Stanislav Sykora_, Jan 06 2014