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 A051723 #16 Jul 02 2025 16:01:58 %S A051723 30,30,140,105,1,140,3960,495,1430,6006,5460,130,7140,2040,5168,14535, %T A051723 11970,14630,15180,5313,6325,89700,23400,6825,142506,7830,125860, %U A051723 53940,40920,92752,628320,6545,6290,442890,329004,45695,151905,223860,493640 %N A051723 Denominators of row 4 of table described in A051714/A051715. %H A051723 M. Kaneko, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL3/KANEKO/AT-kaneko.html">The Akiyama-Tanigawa algorithm for Bernoulli numbers</a>, J. Integer Sequences, 3 (2000), #00.2.9. %e A051723 -1/30 -1/30 -3/140 -1/105 0 ... %Y A051723 Cf. A051722. %K A051723 nonn,easy %O A051723 0,1 %A A051723 _N. J. A. Sloane_ %E A051723 More terms from _James Sellers_, Dec 08 1999