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- Q15264444 subject Q5519261.
- Q15264444 subject Q7020679.
- Q15264444 abstract "In number theory, the Schröder–Hipparchus numbers form an integer sequence that can be used to count the number of plane trees with a given set of leaves, the number of ways of inserting parentheses into a sequence, and the number of ways of dissecting a convex polygon into smaller polygons by inserting diagonals. These numbers begin1, 1, 3, 11, 45, 197, 903, 4279, 20793, 103049, ... (sequence A001003 in OEIS).They are also called the super-Catalan numbers, the little Schröder numbers, or the Hipparchus numbers, after Eugène Charles Catalan and his Catalan numbers, Ernst Schröder and the closely related Schröder numbers, and the ancient Greek mathematician Hipparchus who appears from evidence in Plutarch to have known of these numbers.".
- Q15264444 thumbnail Pentagon_subdivisions.svg?width=300.
- Q15264444 wikiPageExternalLink permutations_polynomials_and_p.html.
- Q15264444 wikiPageWikiLink Q120976.
- Q15264444 wikiPageWikiLink Q12479.
- Q15264444 wikiPageWikiLink Q127840.
- Q15264444 wikiPageWikiLink Q159905.
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- Q15264444 wikiPageWikiLink Q2716994.
- Q15264444 wikiPageWikiLink Q272735.
- Q15264444 wikiPageWikiLink Q41485.
- Q15264444 wikiPageWikiLink Q41523.
- Q15264444 wikiPageWikiLink Q432637.
- Q15264444 wikiPageWikiLink Q4809117.
- Q15264444 wikiPageWikiLink Q5519261.
- Q15264444 wikiPageWikiLink Q592286.
- Q15264444 wikiPageWikiLink Q6965520.
- Q15264444 wikiPageWikiLink Q7020679.
- Q15264444 wikiPageWikiLink Q7100706.
- Q15264444 wikiPageWikiLink Q7169371.
- Q15264444 wikiPageWikiLink Q740970.
- Q15264444 wikiPageWikiLink Q77297.
- Q15264444 wikiPageWikiLink Q860609.
- Q15264444 comment "In number theory, the Schröder–Hipparchus numbers form an integer sequence that can be used to count the number of plane trees with a given set of leaves, the number of ways of inserting parentheses into a sequence, and the number of ways of dissecting a convex polygon into smaller polygons by inserting diagonals. These numbers begin1, 1, 3, 11, 45, 197, 903, 4279, 20793, 103049, ...".
- Q15264444 label "Schröder–Hipparchus number".
- Q15264444 depiction Pentagon_subdivisions.svg.