|
Search: id:A038665
|
|
| |
|
| 3, 8, 25, 84, 294, 1056, 3861, 14300, 53482, 201552, 764218, 2912168, 11143500, 42791040, 164812365, 636438060, 2463251010, 9552774000, 37112526990, 144410649240, 562724141460, 2195581527360, 8576490341250, 33537507830424
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
FORMULA
|
a(n) = (n+3)*C(n+1), C(n): Catalan numbers A000108, G.f.: c(x)*(4-c(x))/sqrt(1-4*x), c(x): G.f. for Catalan numbers.
|
|
MAPLE
|
seq((n+2)*binomial(2*n, n)/(n+1), n=1..24); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Dec 08 2008]
|
|
CROSSREFS
|
Cf. A007054, A000984, A000108, A000777.
Sequence in context: A148796 A148797 A123638 this_sequence A006372 A151426 A045900
Adjacent sequences: A038662 A038663 A038664 this_sequence A038666 A038667 A038668
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)
|
|
|
Search completed in 0.002 seconds
|
