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Search: id:A005969
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| A005969 |
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Sum of fourth powers of Fibonacci numbers.
(Formerly M2106)
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+0
10
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| 1, 2, 18, 99, 724, 4820, 33381, 227862, 1564198, 10714823, 73457064, 503438760, 3450734281, 23651386922, 162109796922, 1111115037483, 7615701104764, 52198777931900, 357775783071021, 2452231602371646, 16807845698458702
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
A. Brousseau, Fibonacci and Related Number Theoretic Tables. Fibonacci Association, San Jose, CA, 1972, p. 19.
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LINKS
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S. Plouffe, Approximations de S\'{e}ries G\'{e}n\'{e}ratrices et Quelques Conjectures, Dissertation, Universit\'{e} du Qu\'{e}bec \`{a} Montr\'{e}al, 1992.
S. Plouffe, 1031 Generating Functions and Conjectures, Universit\'{e} du Qu\'{e}bec \`{a} Montr\'{e}al, 1992.
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FORMULA
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G.f.: [1-4x-4x^2-x^3]/[(1-x)^2(1+3x+x^2)(1-7x+x^2)]. - Ralf Stephan, Apr 23 2004
a(n)=(1/25)*(F(4n+2)-(-1)^n*4*F(2n+1)+6n+3) where F(n)=A000045(n) - Benoit Cloitre (benoit7848c(AT)orange.fr), Sep 13 2004. [Corrected by David Lambert (dave.lambert(AT)comcast.net), Mar 28 2008]
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MAPLE
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with(combinat): l[0] := 0: for i from 1 to 50 do l[i] := l[i-1]+fibonacci(i)^4; printf(`%d, `, l[i]) od:
A005969:=(z+1)*(z**2-5*z+1)/(z**2-7*z+1)/(z**2+3*z+1)/(z-1)**2; [S. Plouffe in his 1992 dissertation.]
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CROSSREFS
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Cf. A001654, A098531, A098532, A098533.
Cf. A119285, A000071, A001654, A005968, A098531, A098532, A098533, A128697.
Sequence in context: A127553 A055357 A087291 this_sequence A094251 A101570 A006043
Adjacent sequences: A005966 A005967 A005968 this_sequence A005970 A005971 A005972
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms and Maple program from James A. Sellers (sellersj(AT)math.psu.edu), May 29 2000
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