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A114697
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Expansion of (1+x+x^2)/((x-1)*(x+1)*(x^2+2*x-1)); a Pellian-related sequence.
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4
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1, 3, 9, 22, 55, 133, 323, 780, 1885, 4551, 10989, 26530, 64051, 154633, 373319, 901272, 2175865, 5253003, 12681873, 30616750, 73915375, 178447501, 430810379, 1040068260, 2510946901
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| a(n+2) - 2*a(n+1) + a(n) = A111955(n+2). Generating floretion: (- .5'j + .5'k - .5j' + .5k' + 'ii' - .5'ij' - .5'ik' - .5'ji' - .5'ki')*('i + 'j + i')
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CROSSREFS
| Cf. A100828, A111954, A113224, A114647, A114688, A114689, A114695, A116699, A000129, A005409.
Sequence in context: A202882 A054442 A192663 * A032284 A203454 A197666
Adjacent sequences: A114694 A114695 A114696 * A114698 A114699 A114700
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KEYWORD
| easy,nonn
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AUTHOR
| Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Feb 18 2006
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