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 A280753 #15 Feb 13 2023 14:45:01 %S A280753 1,3,3,7,2,7,15,5,21,15,31,3,651,186,31,63,7,651,651,651,63,127,4, %T A280753 11811,15748,11811,762,127,255,9,66929,602361,602361,10795,32385,255 %N A280753 Denominators of triangle related to enumeration of minimal 2-covers of a labeled n-set. %H A280753 Octavio A. AgustÃn-Aquino, <a href="http://arxiv.org/abs/1602.05279">Archimedes' quadrature of the parabola and minimal covers</a>, arXiv:1602.05279 [math.CO], 2016. %e A280753 Triangle begins: %e A280753 1, %e A280753 1/3, 1/3, %e A280753 1/7, 1/2, 1/7, %e A280753 1/15, 3/5, 10/21, 1/15, %e A280753 1/31, 2/3, 865/651, 71/186, 1/31, %e A280753 1/63, 5/7, 2630/651, 1427/651, 181/651, 1/63, %e A280753 1/127, 3/4, 163133/11811, 306553/15748, 36667/11811, 145/762, 1/127, %e A280753 ... %Y A280753 Cf. A022166, A057963, A280752. %K A280753 nonn,tabl,more %O A280753 1,2 %A A280753 _N. J. A. Sloane_, Jan 15 2017