%I #9 Oct 03 2025 02:07:37

%S 4,89,1566,20527,183310,1347565,8984158,56952323,351661806,2141759809,

%T 12950960686,78020943223,469112191342,2817757426037,16916183927550,

%U 101527228990219,609257523135022,3655839340823305,21935955102434638

%N Number of arrangements of n+2 numbers in 0..5 with each number being the sum mod 6 of two others.

%C Column 5 of A183884

%H R. H. Hardin, <a href="/A183880/b183880.txt">Table of n, a(n) for n = 1..122</a>

%e Some solutions for n=2

%e ..2....0....3....1....1....0....5....2....3....2....1....2....4....4....2....3

%e ..4....4....4....5....5....4....1....5....0....4....5....2....1....5....3....1

%e ..2....2....1....3....4....2....3....3....3....4....2....0....3....1....1....5

%e ..0....4....5....2....3....2....2....1....0....0....3....4....5....3....5....4

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 07 2011