Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
integer sequence
|
| gptkbp:alsoKnownAs |
gptkb:Schröder-Hipparchus_number
|
| gptkbp:first_terms |
2
1 1806 22 6 90 394 206098 41586 8558 |
| https://www.w3.org/2000/01/rdf-schema#label |
little Schröder number
|
| gptkbp:namedAfter |
gptkb:Ernst_Schröder
|
| gptkbp:numberOfRooms |
number of lattice paths from (0,0) to (n,n) with steps (1,0), (0,1), (1,1) that never rise above the line y=x and do not use (1,1) on the line y=x
|
| gptkbp:OEIS |
gptkb:A001003
|
| gptkbp:recurrence |
S(n) = S(n-1) + sum_{k=1}^{n-1} S(k) * S(n-k) for n > 1, S(0) = 1
|
| gptkbp:relatedTo |
gptkb:Catalan_number
gptkb:large_Schröder_number |
| gptkbp:sequence |
non-negative integer sequence
|
| gptkbp:usedIn |
combinatorics
|
| gptkbp:bfsParent |
gptkb:Schröder's_number
|
| gptkbp:bfsLayer |
7
|