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A102129
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G.f. ((1-x)(2x+1))/((1+x)(x^2+4x-1)).
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0
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1, 4, 15, 66, 277, 1176, 4979, 21094, 89353, 378508, 1603383, 6792042, 28771549, 121878240, 516284507, 2187016270, 9264349585, 39244414612, 166242008031, 704212446738, 2983091794981, 12636579626664, 53529410301635
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| A floretion-generated, Pellian related sequence.
Sequence results from a force transform of the periodic sequence with initial period (1, -1).
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LINKS
| Index entries for sequences related to linear recurrences with constant coefficients
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FORMULA
| a(n) + a(n+1) = A048875(n+1) - A048875(n)
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MATHEMATICA
| CoefficientList[ Series[((-1 + x)(2x + 1))/((1 + x)(x^2 + 4x - 1)), {x, 0, 22}], x] (from Robert G. Wilson v Mar 16 2005)
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PROG
| Floretion Algebra Multiplication Program, FAMP Code: 2ibaseiforseq[A*B] with A = - .5'j + .5'k - .5j' + .5k' - 'ii' - .5'ij' - .5'ik' - .5'ji' - .5'ki' B = - .5'ii' + .5'jj' + .5'kk' + .5e, 1vesforseq(n) = (-1)^n, 2basekforseq[A*B] = A048875, ForType: 1A
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CROSSREFS
| Cf. A048875.
Sequence in context: A134597 A007526 A097422 * A164310 A011967 A055732
Adjacent sequences: A102126 A102127 A102128 * A102130 A102131 A102132
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KEYWORD
| easy,nonn
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AUTHOR
| Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Mar 15 2005
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EXTENSIONS
| Corrected and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 16 2005
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