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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A110046 Expansion of (1+4*x-12*x^2-16*x^3)/((2*x+1)*(2*x-1)*(4*x^2+4*x-1)). 2
1, 8, 28, 144, 656, 3200, 15296, 73984, 356608, 1722368, 8313856, 40144896, 193826816, 935886848, 4518821888, 21818834944, 105350496256, 508677324800, 2456110759936, 11859152338944, 57261050298368, 276480810549248 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..21.

Robert Munafo, Sequences Related to Floretions

Index entries for linear recurrences with constant coefficients, signature (4, 8, -16, -16).

MAPLE

seriestolist(series((1+4*x-12*x^2-16*x^3)/((2*x+1)*(2*x-1)*(4*x^2+4*x-1)), x=0, 25)); -or- Floretion Algebra Multiplication Program, FAMP Code: tesseq[A*B] with A = + 'i - .5'j + .5'k - .5j' + .5k' - 'ii' - .5'ij' - .5'ik' - .5'ji' - .5'ki' and B = - .5'i + .5'j + 'k - .5i' + .5j' - 'kk' - .5'ik' - .5'jk' - .5'ki' - .5'kj'

MATHEMATICA

CoefficientList[Series[(1+4x-12x^2-16x^3)/((2x+1)(2x-1)(4x^2+4x-1)), {x, 0, 40}], x] (* or *) LinearRecurrence[{4, 8, -16, -16}, {1, 8, 28, 144}, 40] (* Harvey P. Dale, Jun 12 2016 *)

CROSSREFS

Cf. A110047, A110048, A110049, A110050.

Sequence in context: A241893 A200188 A255276 * A027380 A226744 A058289

Adjacent sequences:  A110043 A110044 A110045 * A110047 A110048 A110049

KEYWORD

easy,nonn

AUTHOR

Creighton Dement, Jul 10 2005

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified March 23 12:18 EDT 2017. Contains 283951 sequences.