

A200175


Number of 2..2 arrays x(0..n1) of n elements with zero sum and no two consecutive declines, no adjacent equal elements, and no element more than one greater than the previous (random base sawtooth pattern)


1



1, 2, 3, 6, 12, 15, 29, 72, 133, 214, 394, 853, 1782, 3087, 5597, 11777, 24069, 45200, 83805, 167284, 342971, 664695, 1257505, 2476990, 4999659, 9864713, 19023479, 37228518, 74480796, 147868410, 288747975, 565957525, 1124938149, 2237002991
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,2


COMMENTS



LINKS



EXAMPLE

All solutions for n=6
..1....2....1...1....2....1...2....0...1....2....0....0....0....2....0
..0...2...1....0....1...1...1...1....0....0....1....1...2....0....1
..1...1....0....1....2....0....0....0....1....1....2...1...1....1....2
.1....0....1...1...2...1....1....1....0...2...2....0....0...1...1
..0....1...1....0...1....0....2....2....1...1...1....1....1....0....0
.1....0....0....1...2....1....0...2...1....0....0...1....2...2...2


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



