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A221317 Number of nonnegative integer arrays of length n summing to n without equal adjacent values modulo 4 1
1, 2, 7, 14, 28, 66, 168, 378, 866, 2128, 5065, 12000, 28866, 69652, 167994, 405058, 981305, 2381232, 5776411, 14040684, 34175851, 83246764, 202960219, 495273680, 1209625253, 2956269734, 7229756488, 17692733704, 43322486571, 106136686984 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 4 of A221321
LINKS
EXAMPLE
Some solutions for n=7
..0....2....1....3....0....0....0....1....0....0....2....0....3....1....0....1
..3....0....3....2....2....1....1....0....1....1....1....5....0....0....2....2
..0....1....0....0....0....2....0....2....0....0....0....0....1....2....0....1
..1....3....2....1....1....1....2....1....1....3....1....1....0....0....2....0
..0....0....0....0....0....0....1....0....0....0....0....0....1....1....1....1
..1....1....1....1....1....1....0....1....5....3....2....1....0....3....2....0
..2....0....0....0....3....2....3....2....0....0....1....0....2....0....0....2
CROSSREFS
Sequence in context: A200084 A184704 A295963 * A005998 A122751 A152944
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 10 2013
STATUS
approved

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Last modified February 25 13:12 EST 2024. Contains 370330 sequences. (Running on oeis4.)