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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A086443 Expansion of x^2/((1-4x)(1-3x)^2). 2
0, 0, 1, 10, 67, 376, 1909, 9094, 41479, 183412, 792697, 3367618, 14120011, 58605808, 241331965, 987648382, 4022338063, 16318934764, 66007533313, 266354656186, 1072779614035, 4314363685480, 17330677214341, 69552836627830 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

Second binomial transform of A000295. Binomial transform of A066810 (with two leading zeros).

LINKS

Table of n, a(n) for n=0..23.

FORMULA

a(n)=4^n-3^n-n3^(n-1)

CROSSREFS

Sequence in context: A278090 A266443 A108275 * A172066 A026844 A026875

Adjacent sequences:  A086440 A086441 A086442 * A086444 A086445 A086446

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Jul 21 2003

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 January 21 18:06 EST 2019. Contains 319349 sequences. (Running on oeis4.)