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A250557
Number of length n+2 0..4 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero
1
13, 117, 761, 5105, 31525, 177421, 937817, 4803653, 24257725, 121800949, 610147053, 3053493273, 15274472475, 76391277073, 382008613455, 1910192140573, 9551389260819, 47758200502193, 238794678323345, 1193984277090533
OFFSET
1,1
COMMENTS
Column 4 of A250561
LINKS
EXAMPLE
Some solutions for n=6
..0....0....2....0....2....0....1....1....1....2....2....2....1....0....1....0
..3....0....2....2....1....1....0....1....2....0....1....0....0....3....4....0
..4....2....3....0....0....0....2....2....3....0....4....2....4....2....4....4
..4....2....3....1....2....0....4....2....4....2....3....2....4....2....2....4
..3....4....3....2....4....2....2....4....1....0....3....2....4....3....3....0
..4....1....1....2....0....4....1....1....0....3....2....1....1....4....1....1
..1....4....2....3....1....4....1....3....4....1....4....4....0....3....0....0
..2....2....4....3....4....1....2....1....1....3....3....0....3....4....1....0
CROSSREFS
Sequence in context: A021034 A296632 A250316 * A022737 A016295 A225965
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 25 2014
STATUS
approved