login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A053133 One half of binomial coefficients binomial(2n-8,9). 3
5, 110, 1001, 5720, 24310, 83980, 248710, 653752, 1562275, 3453450, 7153575, 14024400, 26225628, 47071640, 81505820, 136719440, 222945905, 354465254, 550858165, 838553320, 1252716850, 1839537700, 2658968130, 3787984200 (list; graph; refs; listen; history; internal format)
OFFSET

9,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 9..200

FORMULA

a(n)= binomial(2*n-8, 9)/2; G.f.: (5+60*x+126*x^2+60*x^3+5*x^4)/(1-x)^10.

a(n) = A053131(n)/2.

PROG

(PARI) a(n)=binomial(2*n-8, 9)/2 \\ Charles R Greathouse IV, Oct 03 2011

(MAGMA) [Binomial(2*n-8, 9)/2: n in [9..40]]; // Vincenzo Librandi, Oct 07 2011

CROSSREFS

Cf. A053131.

Sequence in context: A188457 A003465 A177680 * A203367 A002400 A086805

Adjacent sequences:  A053130 A053131 A053132 * A053134 A053135 A053136

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 06:48 EST 2012. Contains 205577 sequences.