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Search: id:A108791
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| A108791 |
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a(2n) = -5*(Fib(6n+2))^2, a(2n+1) = (Luc(6n+5))^2. |
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+0
1
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| -5, 121, -2205, 39601, -710645, 12752041, -228826125, 4106118241, -73681302245, 1322157322201, -23725150497405, 425730551631121, -7639424778862805, 137083915467899401, -2459871053643326445, 44140595050111976641, -792070839848372253125
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Define the floretions A = + 'i - 'k + i' - k' - 'jj' - 'ij' - 'ji' - 'jk' - 'kj'; B = - 'i + 'j - i' + j' - 'kk' - 'ik' - 'jk' - 'ki' - 'kj'; C = - 'j + 'k - j' + k' - 'ii' - 'ij' - 'ik' - 'ji' - 'ki'. The floretion given in the program code is A*B*C.
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FORMULA
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G.f. (-5+26*x-x^2)/((x+1)*(x^2+18*x+1))
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MAPLE
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seriestolist(series(-(5-26*x+x^2)/((x+1)*(x^2+18*x+1)), x=0, 25)); -or- Floretion Algebra Multiplication Program, FAMP Code: 1vesseq[ + 14'i - 2'j - 2'k + 14i' - 2j' - 2k' + 4'ii' - 12'jj' + 12'kk' - 4'ij' - 4'ji' - 8'jk' - 8'kj' - 5e]
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CROSSREFS
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Adjacent sequences: A108788 A108789 A108790 this_sequence A108792 A108793 A108794
Sequence in context: A054752 A128275 A028448 this_sequence A012179 A012026 A012190
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KEYWORD
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easy,sign
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AUTHOR
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Creighton Dement (creighton.k.dement(AT)uni-oldenburg.de), Jul 06 2005
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