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 A267248 #3 Jan 12 2016 09:10:12 %S A267248 6,63,486,3351,20040,107015,516084,2278687,9303052,35428544,126753732, %T A267248 428651446,1377310514,4223642819,12409437728,35050866249,95459908872, %U A267248 251341796912,641282264972,1588863292072 %N A267248 Number of 5Xn binary arrays with row sums nondecreasing and columns lexicographically nondecreasing. %C A267248 Row 5 of A267245. %e A267248 Some solutions for n=4 %e A267248 ..0..0..0..0....0..0..0..1....0..0..0..0....0..0..0..0....0..0..0..0 %e A267248 ..0..0..1..1....0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..0 %e A267248 ..1..1..0..0....0..0..1..0....0..1..1..0....0..0..1..0....0..0..0..1 %e A267248 ..1..1..0..1....1..1..0..1....1..0..1..1....1..1..0..1....0..0..1..1 %e A267248 ..1..1..1..1....0..1..1..1....0..1..1..1....0..1..1..1....1..1..1..1 %Y A267248 Cf. A267245. %K A267248 nonn %O A267248 1,1 %A A267248 _R. H. Hardin_, Jan 12 2016