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A111734
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Expansion of (1-x)*(2*x^2+2*x+1)/((x^2-x-1)*(x^2+x+1)).
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0
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-1, 1, -1, 3, -6, 10, -15, 23, -37, 61, -100, 162, -261, 421, -681, 1103, -1786, 2890, -4675, 7563, -12237, 19801, -32040, 51842, -83881, 135721, -219601, 355323, -574926, 930250, -1505175, 2435423, -3940597, 6376021, -10316620, 16692642, -27009261, 43701901, -70711161, 114413063
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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REFERENCES
| C. Dement, Floretion Integer Sequences (work in progress)
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (-2,-1,0,1).
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FORMULA
| a(n) = ((-1)^n/2)*A007039(n); a(n) + a(n+1) + a(n+2) = ((-1)^n)*A000204(n)
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MAPLE
| Floretion Algebra Multiplication Program, FAMP Code: 2tesseq[(.5'j + .5'k + .5j' + .5k' + .5'ij' - .5'ik' + .5'ji' + .5'ki')*(.5'i + .5'j + .5'k + .5e)]
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CROSSREFS
| Cf. A000204, A007039.
Sequence in context: A139714 A063542 A122554 * A117457 A024674 A026104
Adjacent sequences: A111731 A111732 A111733 * A111735 A111736 A111737
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KEYWORD
| easy,sign
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AUTHOR
| Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Nov 18 2005
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