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A096883
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Expansion of (1+10x)/(1-101x^2).
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1
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1, 10, 101, 1010, 10201, 102010, 1030301, 10303010, 104060401, 1040604010, 10510100501, 105101005010, 1061520150601, 10615201506010, 107213535210701, 1072135352107010, 10828567056280801, 108285670562808010
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n)=9a(n-1)+10a(n-2)+101^floor((n-2)/2); a(n)=sum{k=0..floor(n/2), binomial(floor(n/2), k)10^(n-2k) }.
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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