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A258627
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Number of length n 1..(4+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7.
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1
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4, 20, 80, 264, 809, 2506, 8432, 30362, 109520, 391836, 1408127, 5002188, 17308136, 59463783, 210199210, 774578726, 2918410859, 10951007498, 40430881133, 146973680685, 527988483182, 1880363101497, 6679919969564, 23928818399537
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=8
..3....5....5....4....5....4....4....2....4....5....5....4....4....2....4....5
..5....5....3....4....3....3....1....5....2....5....5....1....2....4....3....4
..4....5....2....2....4....5....4....5....1....2....4....3....1....3....5....3
..3....3....4....4....4....2....3....3....5....3....2....4....3....1....3....2
..1....2....2....4....4....2....2....1....4....3....4....4....5....4....3....2
..4....1....4....4....1....4....2....2....4....4....4....2....1....1....2....2
..2....1....1....2....3....4....2....2....5....3....2....2....4....1....5....4
..4....4....4....4....4....2....2....4....2....3....1....4....2....4....1....2
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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