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 A224352 #6 Jul 23 2025 05:06:50 %S A224352 36,1296,26610,363392,3816783,34697869,300892325,2654062881, %T A224352 24422915139,233364588801,2281743365906,22551656451002, %U A224352 223794737692968,2224124508821224,22127253845604143,220432254659284132 %N A224352 Number of nX7 0..2 arrays with diagonals and antidiagonals unimodal and rows nondecreasing. %C A224352 Column 7 of A224353 %H A224352 R. H. Hardin, <a href="/A224352/b224352.txt">Table of n, a(n) for n = 1..210</a> %e A224352 Some solutions for n=3 %e A224352 ..1..1..1..1..1..2..2....0..0..0..0..0..1..1....1..1..1..1..2..2..2 %e A224352 ..0..1..1..1..1..1..2....0..0..1..1..1..1..1....2..2..2..2..2..2..2 %e A224352 ..0..1..1..1..1..2..2....0..0..0..0..1..1..2....0..2..2..2..2..2..2 %K A224352 nonn %O A224352 1,1 %A A224352 _R. H. Hardin_ Apr 04 2013