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

 

Logo


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

From Vincenzo Librandi, Mar 18 2011: (Start)

a(n) = 40*a(n-1) - 593*a(n-2) + 3854*a(n-3) - 9240*a(n-4), n >= 4.

a(n) = 23*a(n-1) - 132*a(n-2) + (10^(n+1) - 7^(n+1))/3, n >= 2. (End)

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 | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 29 01:40 EST 2021. Contains 349416 sequences. (Running on oeis4.)