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A199845 Number of -6..6 arrays x(0..n-1) of n elements with zero sum and no element more than one greater than the previous.

%I A199845 #7 Jul 22 2025 13:25:14
%S A199845 1,7,32,149,630,2600,10426,41079,159330,611698,2329458,8818874,
%T A199845 33234990,124835120,467743203,1749482957,6535398559,24393753898,
%U A199845 91006458115,339442473410,1266045976128,4722720042212,17621749081077,65775214030886
%N A199845 Number of -6..6 arrays x(0..n-1) of n elements with zero sum and no element more than one greater than the previous.
%C A199845 Column 6 of A199847
%H A199845 R. H. Hardin, <a href="/A199845/b199845.txt">Table of n, a(n) for n = 1..165</a>
%e A199845 Some solutions for n=6
%e A199845 ..0....4....6....6....1....2....4....6....6....5....6....6....3....4....5....5
%e A199845 ..1....1....4....5....1....2...-2....2....4....2....4....2....2....2....6...-1
%e A199845 ..2....2....0....2....0....1...-1...-1...-2....0....0...-2....2....2....1...-2
%e A199845 .-2....0...-1...-5....1....1....0...-1...-2...-3...-2...-3....0....2...-3...-1
%e A199845 .-1...-2...-5...-4....1...-1....0...-3...-1...-2...-4...-2...-2...-4...-5....0
%e A199845 ..0...-5...-4...-4...-4...-5...-1...-3...-5...-2...-4...-1...-5...-6...-4...-1
%K A199845 nonn
%O A199845 1,2
%A A199845 _R. H. Hardin_ Nov 11 2011