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Search: id:A010691
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| 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10, 1, 10
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n)=-9/2*(-1)^n+11/2 a(n)=10*(n mod 2)+(n+1) mod 2 - Paolo P. Lava (ppl(AT)spl.at), Oct 20 2006
G.f.:(1+10*z)/((1-z^2)) . [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 25 2009]
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MAPLE
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g:=(1+10*z)/((1-z^2)): gser:=series(g, z=0, 66): seq((coeff(gser, z, n)), n=0..65); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Feb 25 2009]
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CROSSREFS
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Sequence in context: A144261 A046148 A164915 this_sequence A143970 A093645 A130858
Adjacent sequences: A010688 A010689 A010690 this_sequence A010692 A010693 A010694
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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