|
Search: id:A007004
|
|
|
| A007004 |
|
(3n)! / (n+1)(n!)^3.
(Formerly M3125)
|
|
+0
1
|
|
| 1, 3, 30, 420, 6930, 126126, 2450448, 49884120, 1051723530, 22787343150, 504636071940, 11377249621920, 260363981732400, 6034149862347600, 141371511060715200, 3343436236585914480, 79726203788589122490
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Equals A000108*binomial(3*n,n) - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 27 2006
|
|
FORMULA
|
Binomial(2*n,n)*binomial(3*n,n)/(n+1) - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 27 2006
|
|
MAPLE
|
[seq(binomial(2*n, n)*binomial(3*n, n)/(n+1), n=0..17)]; - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 27 2006
|
|
CROSSREFS
|
Cf. A000108.
Adjacent sequences: A007001 A007002 A007003 this_sequence A007005 A007006 A007007
Sequence in context: A037659 A131586 A058831 this_sequence A012003 A064352 A080527
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
njas, Jim Propp (propp(AT)math.wisc.edu)
|
|
EXTENSIONS
|
More terms from Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), May 27 2006
|
|
|
Search completed in 0.002 seconds
|
