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A273186
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Taxi-cab numbers (A001235) n such that n+1 is the sum of two positive cubes (A003325).
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0
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OFFSET
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1,1
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COMMENTS
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Numbers n such that n+1 and n can be written, respectively, in at least one and two ways as the sum of two positive cubes.
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LINKS
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EXAMPLE
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a(1) = 2514^3 + 1364^3 = 2498^3 + 1416^3, a(1)+1 = 2641^3 + 182^3.
a(2) = 2492^3 + 1734^3 = 2726^3 + 756^3, a(2)+1 = 2282^3 + 2065^3.
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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