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 A183888 #7 Jul 22 2025 09:16:58 %S A183888 8,982,20152,201154,1466628,9469778,58702904,357576342,2161032260, %T A183888 13012476622,78214995120,469720252818,2819655668996,16922097475386, %U A183888 101545629217608,609314732885086,3656017115990916,21936507241621846 %N A183888 Number of arrangements of n+3 numbers in 0..5 with each number being the sum mod 6 of three others. %C A183888 Column 5 of A183892 %H A183888 R. H. Hardin, <a href="/A183888/b183888.txt">Table of n, a(n) for n = 1..58</a> %e A183888 Some solutions for n=2 %e A183888 ..4....1....4....4....0....1....0....2....4....3....4....2....3....1....1....0 %e A183888 ..1....0....3....1....5....2....1....0....3....4....5....3....5....4....1....3 %e A183888 ..2....3....5....4....4....3....2....3....0....5....2....5....1....0....3....0 %e A183888 ..0....2....1....5....1....0....3....1....5....1....3....1....3....1....1....3 %e A183888 ..3....4....0....3....3....4....5....5....1....4....0....0....1....2....3....0 %K A183888 nonn %O A183888 1,1 %A A183888 _R. H. Hardin_ Jan 07 2011