|
| |
|
|
A159288
|
|
Expansion of (1+x+x^2)/(1-x^2-2*x^3)
|
|
4
| |
|
|
1, 1, 2, 3, 4, 7, 10, 15, 24, 35, 54, 83, 124, 191, 290, 439, 672, 1019, 1550, 2363, 3588, 5463, 8314, 12639, 19240, 29267, 44518, 67747, 103052, 156783, 238546, 362887, 552112, 839979, 1277886, 1944203, 2957844, 4499975, 6846250, 10415663
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,3
|
|
|
COMMENTS
| A floretion-generated sequence: 'i + 0.5('ij' + 'ik' + 'ji' + 'jk' + 'ki' + 'kj')
|
|
|
LINKS
| Creighton Dement, Online Floretion Multiplier
|
|
|
FORMULA
| a(n)=A159287(n)+A159287(n+1)+A159287(n+2). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 10 2009]
|
|
|
MATHEMATICA
| CoefficientList[Series[(1+x+x^2)/(1-x^2-2x^3), {x, 0, 50}], x] (* From Harvey P. Dale, Mar 09 2011 *)
|
|
|
CROSSREFS
| A159284, A159285, A159286, A159287
Sequence in context: A129490 A018132 A100638 * A033320 A013982 A202411
Adjacent sequences: A159285 A159286 A159287 * A159289 A159290 A159291
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Apr 08 2009
|
| |
|
|
