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Search: id:A145849
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OFFSET
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1,2
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COMMENT
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Every positive odd integer m==3 (mod 8) is a unique sum of the form a(s)+2a(t), while other odd integers are not expressible in this form.
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FORMULA
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If f(x)=sum_{n>=1}x^a(n), abs(x)<1, then f(x)*f(x^2)=x^3/(1-x^8).
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CROSSREFS
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Sequence in context: A051662 A061913 A130444 this_sequence A111045 A020226 A111351
Adjacent sequences: A145846 A145847 A145848 this_sequence A145850 A145851 A145852
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KEYWORD
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nonn
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AUTHOR
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Vladimir Shevelev (shevelev(AT)bgu.ac.il), Oct 21 2008
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