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 A058717 #16 Aug 17 2022 15:35:19 %S A058717 1,1,1,1,2,1,1,4,3,1,1,6,9,4,1,1,10,25,18,5,1,1,14,70,85,31,6,1,1,21, %T A058717 217,832,288,51,7,1 %N A058717 Triangle T(n,k) giving number of nonisomorphic loopless matroids of rank k on n labeled points (n >= 1, 1<=k<=n). %H A058717 W. M. B. Dukes, <a href="http://www.stp.dias.ie/~dukes/matroid.html">Tables of matroids</a> %H A058717 W. M. B. Dukes, <a href="http://www.stp.dias.ie/~dukes/phd.html">Counting and Probability in Matroid Theory</a>, Ph.D. Thesis, Trinity College, Dublin, 2000. %H A058717 <a href="/index/Mat#matroid">Index entries for sequences related to matroids</a> %H A058717 W. M. B. Dukes, <a href="http://arXiv.org/abs/math.CO/0411557">On the number of matroids on a finite set</a> %e A058717 1; %e A058717 1, 1; %e A058717 1, 2, 1; %e A058717 1, 4, 3, 1; %e A058717 1, 6, 9, 4, 1; %e A058717 1, 10, 25, 18, 5, 1; %e A058717 1, 14, 70, 85, 31, 6, 1; %e A058717 1, 21, 217, 832, 288, 51, 7, 1; %e A058717 ... %Y A058717 Cf. A058716 (same except for border), A058710, A058711. %Y A058717 Row sums give A058718. Diagonals give A000065, A058719. %K A058717 nonn,tabl,nice %O A058717 1,5 %A A058717 _N. J. A. Sloane_, Dec 31 2000 %E A058717 Corrected and extended by _Jean-François Alcover_, Oct 21 2013 %E A058717 Reverted to original data by _Jean-François Alcover_, Aug 17 2022