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 A183882 #7 Jul 22 2025 09:16:29 %S A183882 4,35,1986,52827,885690,10540371,104446714,938543435,7996169226, %T A183882 66170227587,538977760842,4352945018619,34996920361210, %U A183882 280699272183347,2248598404709850,18001206351037995,144060870372238122 %N A183882 Number of arrangements of n+2 numbers in 0..7 with each number being the sum mod 8 of two others. %C A183882 Column 7 of A183884 %H A183882 R. H. Hardin, <a href="/A183882/b183882.txt">Table of n, a(n) for n = 1..65</a> %e A183882 Some solutions for n=2 %e A183882 ..6....6....2....2....0....2....6....4....4....4....6....4....6....6....4....2 %e A183882 ..6....2....6....6....4....4....6....4....0....2....4....0....2....2....6....6 %e A183882 ..4....2....4....6....0....6....2....0....4....2....2....4....6....4....6....2 %e A183882 ..2....4....2....4....4....2....4....0....0....6....6....4....4....2....2....4 %K A183882 nonn %O A183882 1,1 %A A183882 _R. H. Hardin_ Jan 07 2011