

A202956


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


1



6, 28, 82, 200, 524, 1724, 5908, 18340, 53680, 162080, 515626, 1651124, 5168256, 15997588, 50018962, 158377344, 502147864, 1584312736, 4991421852, 15779264936, 50053153920, 158866891408, 503893624892, 1598691706648, 5078888702164
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OFFSET

1,1


COMMENTS

Column 2 of A202962


LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210


EXAMPLE

Some solutions for n=5
..0....2....0...1....2....2...1....1...1...1...2....0....2....0....0....2
.1....0...2....0....0....0....2...2...2....0....0...1....0...2....1....0
..2...2....1...1....2...2...1....1....1...2...1...2....1...1...2...1
..0...1....0....0...1...1....2....0...2....0....2....0....0....2...1....2
.2....0...1....1...2....0...1...1....1....1....0....2...1...1....0...1
..0...1....2....0....0....1....0....2....2....2...1....1....0....2....2...2
..1....2....0....1...1....0...1...1....1....0....2....0...2....0....0....0


CROSSREFS

Sequence in context: A326484 A144945 A308585 * A279915 A300906 A222198
Adjacent sequences: A202953 A202954 A202955 * A202957 A202958 A202959


KEYWORD

nonn


AUTHOR

R. H. Hardin Dec 26 2011


STATUS

approved



