login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A196568 Binomial coefficients of the form C(n, 3) that are products of binomial coefficients of the form C(n, 3). 0
560, 19600, 43680, 893200, 1521520, 7207200, 29269240, 2845642800, 26595476600, 249466897680 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(11), if it exists, > C(5*10^6,3). [D. S. McNeil, Oct 26 2011]

LINKS

Table of n, a(n) for n=1..10.

Erich Friedman, Problem of the month October 2011

EXAMPLE

560 = C(16, 3) = C(8, 3) * C(5, 3)

19600 = C(50, 3) = C(16, 3) * C(7, 3)

43680 = C(65, 3) = C(14, 3) * C(10, 3)

893200 = C(176, 3) = C(30, 3) * C(12, 3)

and so on.

CROSSREFS

Sequence in context: A169719 A104591 A318119 * A171347 A193171 A013487

Adjacent sequences:  A196565 A196566 A196567 * A196569 A196570 A196571

KEYWORD

nonn,more

AUTHOR

Kausthub Gudipati, Oct 04 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 4 11:35 EST 2020. Contains 338923 sequences. (Running on oeis4.)