A047697 - OEIS

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A047697

Smallest positive number that can be written in n ways as a sum of two (not necessarily positive) coprime cubes.

1, 91, 3367, 16776487, 506433677359393 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	REFERENCES	`R. K. Guy, Unsolved Problems in Number Theory, Section D1.`
	LINKS	`D. J. Bernstein, Enumerating solutions to p(a) + q(b) = r(c) + s(d)`
	CROSSREFS	`Cf. A047696.` `Sequence in context: A008394 A133416 A169937 * A096054 A129965 A017807` `Adjacent sequences: A047694 A047695 A047696 * A047698 A047699 A047700`
	KEYWORD	`nonn,nice,hard`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 17 16:39 EST 2012. Contains 206058 sequences.