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A202959 Number of arrays of n+2 integers in -5..5 with sum zero and adjacent elements differing in absolute value.

%I A202959 #7 Jul 22 2025 16:53:35
%S A202959 62,544,4048,33736,289536,2475008,21274708,184258272,1602929218,
%T A202959 13990833912,122510857450,1075782280468,9468706858932,83511798894532,
%U A202959 737905024410346,6530699064229052,57882816085025096,513698095091077304
%N A202959 Number of arrays of n+2 integers in -5..5 with sum zero and adjacent elements differing in absolute value.
%C A202959 Column 5 of A202962
%H A202959 R. H. Hardin, <a href="/A202959/b202959.txt">Table of n, a(n) for n = 1..210</a>
%e A202959 Some solutions for n=4
%e A202959 .-2...-2...-2....4....2....4....1...-4...-2....4...-1....2....3...-2...-2...-4
%e A202959 ..0....5....5....0....1....0....4....2...-1....2...-3....0...-2...-5....1....1
%e A202959 .-3...-1...-3....3....2...-2...-1....3...-4...-3....1....2....1....1....5....4
%e A202959 ..4...-3....2....1....4....3....3...-2....5...-5...-2...-3...-3....3....1...-3
%e A202959 ..1....4...-3...-3...-5...-5...-2...-4....0...-1....3...-2....2...-1...-4....0
%e A202959 ..0...-3....1...-5...-4....0...-5....5....2....3....2....1...-1....4...-1....2
%K A202959 nonn
%O A202959 1,1
%A A202959 _R. H. Hardin_ Dec 26 2011