|
%I #5 Mar 31 2012 12:36:36
%S 1,10,90,860,8470,84852,860854,8815392,90927530,943302430,9832131238,
%T 102882332054,1080105471952,11371474312404,120012768975248,
%U 1269300095287288,13449845528174042,142756162602411602
%N Number of -5..5 arrays x(0..n-1) of n elements with zero sum and no two consecutive zero elements
%C Column 5 of A199530
%H R. H. Hardin, <a href="/A199527/b199527.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for n=5
%e ..1...-2...-3....4....5...-2...-2...-1...-2...-4...-3...-4....4....1...-1...-2
%e ..1....0....4...-4...-5....1...-5....4....1....5....3...-5...-3...-1....1...-4
%e .-4...-2....2....2....0....3....3...-3...-4....2....2...-1....1....5...-2....4
%e .-1....4....0...-4...-3....2....3...-4....1...-3....2....5...-5...-5...-3....0
%e ..3....0...-3....2....3...-4....1....4....4....0...-4....5....3....0....5....2
%K nonn
%O 1,2
%A _R. H. Hardin_ Nov 07 2011
| 