|
Search: id:A056616
|
|
|
| A056616 |
|
Numerator of binomial(2n,n)/(2n+1). |
|
+0
3
|
|
| 1, 2, 6, 20, 70, 252, 924, 1144, 12870, 48620, 184756, 705432, 2704156, 10400600, 40116600, 155117520, 200360130, 466721244, 9075135300, 11781754600, 137846528820, 538257874440, 140273264248, 8233430727600, 32247603683100
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
It is easy to type binomial(2n,n)/(2n+1) by mistake, when one really wants the Catalan numbers binomial(2n,n)/(n+1), A000108.
Differs from A000984 at positions in A101681.
|
|
EXAMPLE
|
1, 2/3, 6/5, 20/7, 70/9, 252/11, 924/13, 1144/5, 12870/17, ...
|
|
CROSSREFS
|
Cf. A056617, A000108.
Sequence in context: A065345 A130914 A087944 this_sequence A065346 A071976 A000984
Adjacent sequences: A056613 A056614 A056615 this_sequence A056617 A056618 A056619
|
|
KEYWORD
|
nonn,frac
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com), Aug 28 2000
|
|
|
Search completed in 0.002 seconds
|
