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 A172557 #23 Oct 12 2024 21:14:38 %S A172557 1,252,1172556,14367744720,273957842462220,6736218287430460752, %T A172557 195428754450309450171024,6368685647203261761403856832, %U A172557 226226183763370772622682749527820,8588121524476528848476120449733261520,343706681395653993021794459883981791479056,14359560914153299239163671050863513324047517632 %N A172557 Number of 2*n X 10 binary arrays with row sums 5 and column sums n. %H A172557 Christoph Koutschan, <a href="/A172557/b172557.txt">Table of n, a(n) for n = 0..50</a> (terms n=1..24 from R. H. Hardin) %H A172557 Robert Dougherty-Bliss, Christoph Koutschan, Natalya Ter-Saakov, and Doron Zeilberger, <a href="https://arxiv.org/abs/2410.07435">The (Symbolic and Numeric) Computational Challenges of Counting 0-1 Balanced Matrices</a>, arXiv:2410.07435 [math.CO], 2024. %Y A172557 Column k=5 of A376935. %K A172557 nonn %O A172557 0,2 %A A172557 _R. H. Hardin_, Feb 06 2010 %E A172557 a(0)=1 prepended by _Christoph Koutschan_, Oct 12 2024