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 A183371 #7 Jul 22 2025 08:52:47 %S A183371 1,9,16,49,64,144,729,2304,6724,22500,89401,368449,1399489,5345344, %T A183371 21501769,87796900,354531241,1422345796,5746246416,23369542641, %U A183371 94966283556,385048793529,1561870063504,6344716152384,25783758328441 %N A183371 Number of nX4 binary arrays with no element equal to the mod 3 sum of its diagonal and antidiagonal neighbors. %C A183371 Column 4 of A183374 %H A183371 R. H. Hardin, <a href="/A183371/b183371.txt">Table of n, a(n) for n = 1..200</a> %e A183371 Some solutions for 5X4 %e A183371 ..0..0..0..0....0..0..0..0....0..1..0..0....1..0..0..0....0..1..0..1 %e A183371 ..0..1..1..0....1..1..1..1....1..1..1..1....0..0..1..1....0..1..0..1 %e A183371 ..1..1..1..1....0..0..0..0....0..1..0..1....1..1..0..1....0..1..0..1 %e A183371 ..1..1..1..0....1..1..1..1....0..0..1..0....0..0..1..1....0..1..0..1 %e A183371 ..0..1..0..0....0..0..0..0....1..0..1..0....1..0..0..0....0..1..0..1 %K A183371 nonn %O A183371 1,2 %A A183371 _R. H. Hardin_ Jan 04 2011