A085367 - OEIS

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A085367

Semiprimes that can be expressed as the sum or difference of two cubes. Common terms of A001358 and A045980.

9, 26, 35, 65, 91, 133, 169, 215, 217, 218, 335, 341, 386, 407, 469, 485, 511, 559, 721, 737, 793, 817, 866, 973, 1027, 1115, 1141, 1241, 1261, 1267, 1339, 1343, 1385, 1387, 1538, 1603, 1685, 1727, 1843, 1853, 1981, 2071, 2189, 2402, 2413, 2611, 2743, 2771 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	EXAMPLE	`a(1)=9 because 2^3+1^3=33, a(2)=26=3^3-1^3=213.` `a(5)=91 is the smallest semiprime expressible in two different ways: 91=4^3+3^3=6^3-5^3=7*13`
	CROSSREFS	`Cf. A001358, A045980, A085366.` `Sequence in context: A144701 A022421 A075395 * A081267 A052153 A154560` `Adjacent sequences: A085364 A085365 A085366 * A085368 A085369 A085370`
	KEYWORD	`nonn`
	AUTHOR	`Hugo Pfoertner (hugo(AT)pfoertner.org), Jun 25 2003`

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Last modified February 15 02:50 EST 2012. Contains 205694 sequences.