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Search: id:A114647
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| A114647 |
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Expansion of (-3+4*x+3*x^2)/((1-x)*(x+1)*(x^2+2*x-1)); a Pellian-related sequence. |
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+0
34
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| 3, 2, 7, 12, 31, 70, 171, 408, 987, 2378, 5743, 13860, 33463, 80782, 195027, 470832, 1136691, 2744210, 6625111, 15994428, 38613967, 93222358, 225058683, 543339720, 1311738123
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Generating floretion: - 1.5'i + 'j + 'k - .5i' + j' + k' + .5'ii' - .5'jj' - .5'kk' - 'ij' + 'ik' - 'ji' + .5'jk' + 2'ki' - .5'kj' + .5e
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FORMULA
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a(n) = A000129(n+1)+2*A059841(n). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 10 2009]
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CROSSREFS
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Cf. A100828, A114688, A114689, A114695, A114696, A114697, A000129.
Sequence in context: A143329 A053440 A143332 this_sequence A052546 A049968 A049970
Adjacent sequences: A114644 A114645 A114646 this_sequence A114648 A114649 A114650
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KEYWORD
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easy,nonn,new
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AUTHOR
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Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Feb 18 2006
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