id:A055041 - OEIS Search Results

Search: id:A055041

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Numbers of the form 3^(2i+1)*(3*j+1).

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3, 12, 21, 27, 30, 39, 48, 57, 66, 75, 84, 93, 102, 108, 111, 120, 129, 138, 147, 156, 165, 174, 183, 189, 192, 201, 210, 219, 228, 237, 243, 246, 255, 264, 270, 273, 282, 291, 300, 309, 318, 327, 336, 345, 351, 354, 363, 372, 381, 390, 399 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`The numbers not of the form x^2+y^2+6z^2.`
	REFERENCES	`L. J. Mordell, A new Waring's problem with squares of linear forms, Quart. J. Math., 1 (1930), 276-288 (see p. 283).`
	CROSSREFS	`Sequence in context: A080767 A043465 A074276 this_sequence A061819 A017197 A051369` `Adjacent sequences: A055038 A055039 A055040 this_sequence A055042 A055043 A055044`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jun 01 2000`

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Last modified December 4 08:03 EST 2009. Contains 170310 sequences.

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