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 A224032 #7 Jul 23 2025 04:55:00 %S A224032 2,8,37,168,734,3107,12856,52356,210890,843084,3353221,13291387, %T A224032 52567559,207621934,819398693,3232688584,12752707695,50314551092, %U A224032 198559706395,783841017918,3095442338516,12228799206771 %N A224032 Number of n X n 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing. %C A224032 Diagonal of A224038 %e A224032 Some solutions for n=3 %e A224032 ..0..0..0....0..1..1....0..0..1....1..1..1....0..0..1....0..0..1....1..1..1 %e A224032 ..0..1..1....0..0..1....0..0..1....0..1..1....0..1..1....0..1..1....0..1..1 %e A224032 ..0..1..1....0..0..0....0..1..1....1..1..1....0..0..1....0..1..1....0..0..1 %K A224032 nonn %O A224032 1,1 %A A224032 _R. H. Hardin_ Mar 30 2013