|
Search: id:A052203
|
|
|
| A052203 |
|
a(n)=(4n+1)*binomial(4n,n)/(3n+1). |
|
+0
6
|
|
| 1, 5, 36, 286, 2380, 20349, 177100, 1560780, 13884156, 124403620, 1121099408, 10150595910, 92263734836, 841392966470, 7694644696200, 70539987842520, 648045936942300, 5964720367660956, 54991682779774384, 507749884105448600
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Central terms of the triangle in A122366. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 30 2006
|
|
FORMULA
|
a(n)=C(4n+1, n); a(n) is asymptotic to c/sqrt(n)*(256/27)^n with c=0.614... - Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 27 2003
|
|
CROSSREFS
|
Cf. A002293 and A051944.
Sequence in context: A098305 A055270 A164110 this_sequence A027331 A091161 A135149
Adjacent sequences: A052200 A052201 A052202 this_sequence A052204 A052205 A052206
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Barry E. Williams, Jan 28 2000
|
|
EXTENSIONS
|
More terms from James A. Sellers (sellersj(AT)math.psu.edu), Jan 31 2000
|
|
|
Search completed in 0.002 seconds
|
