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 A376185 #14 Jul 09 2025 05:06:08 %S A376185 12,48,624,97968,2399530224,1439436326371902768, %T A376185 517994234419759747473589427583418224, %U A376185 67079506723028253472357256785558488997471406450171845011442457607246768 %N A376185 a(n) = denominator of the sum S(n) defined in A376062. %H A376185 N. J. A. Sloane, <a href="https://www.youtube.com/watch?v=3RAYoaKMckM">A Nasty Surprise in a Sequence and Other OEIS Stories</a>, Experimental Mathematics Seminar, Rutgers University, Oct 10 2024, Youtube video; <a href="https://sites.math.rutgers.edu/~zeilberg/expmath/sloane85BD.pdf">Slides</a> [Mentions this sequence] %F A376185 1/a(n) = 1/a(n-1) - 1/(4*A376062(n)) for n >= 2. %e A376185 The initial values of S(n) are 7/12, 43/48, 619/624, 97963/97968, 2399530219/2399530224, 1439436326371902763/1439436326371902768 ... %Y A376185 Cf. A374663, A375516, A375531, A375532, A375781, A375522, A376048-A376062. %K A376185 nonn,frac %O A376185 1,1 %A A376185 _N. J. A. Sloane_, Sep 15 2024