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 A197314 #7 Jun 02 2025 04:50:30 %S A197314 2,9,128,152,1033,4780,24903,113774,553807,2751427,13385323,64601708, %T A197314 318081207,1550881210,7598781154,37018138503,181198882339, %U A197314 884596380240,4326961466564,21126289404408,103287098681855,504482396779592 %N A197314 Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,1,1,0,0 for x=0,1,2,3,4. %C A197314 Every 0 is next to 0 0's, every 1 is next to 1 1's, every 2 is next to 2 1's, every 3 is next to 3 0's, every 4 is next to 4 0's %C A197314 Column 5 of A197317 %H A197314 R. H. Hardin, <a href="/A197314/b197314.txt">Table of n, a(n) for n = 1..210</a> %e A197314 Some solutions containing all values 0 to 4 for n=4 %e A197314 ..0..3..0..1..1....0..3..0..1..1....1..0..3..0..1....0..2..1..1..2 %e A197314 ..1..0..4..0..2....1..0..4..0..2....1..3..0..3..1....1..1..0..2..1 %e A197314 ..1..2..0..1..1....1..2..0..1..1....2..0..4..0..2....2..0..4..0..1 %e A197314 ..0..1..1..2..0....2..1..1..2..0....1..1..0..1..1....1..1..0..3..0 %K A197314 nonn %O A197314 1,1 %A A197314 _R. H. Hardin_ Oct 13 2011