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

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A028228 Expansion of 1/((1-7x)(1-10x)(1-11x)(1-12x)). 0
1, 40, 1007, 20414, 364329, 5979036, 92485219, 1369339018, 19606630637, 273438929192, 3733694351751, 50109751007862, 662977655746225, 8667106208101108, 112162143040653803, 1438993526155501346 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..15.

FORMULA

a(n) = 40*a(n-1) -593*a(n-2) +3854*a(n-3) -9240*a(n-4), n>=4. - Vincenzo Librandi, Mar 18 2011

a(n) = 23*a(n-1) -132*a(n-2) +(10^(n+1) -7^(n+1))/3, n>=2. - Vincenzo Librandi, Mar 18 2011

a(n) = 6*12^(n+2)/5 -11^(n+3)/4 +5*10^(n+2)/3-7^(n+3)/60 . - R. J. Mathar, Mar 20 2011

CROSSREFS

Sequence in context: A172510 A004349 A016092 * A165380 A075907 A062143

Adjacent sequences:  A028225 A028226 A028227 * A028229 A028230 A028231

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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

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

Last modified December 22 17:44 EST 2014. Contains 252364 sequences.