A119973 - OEIS

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A119973

Numbers of the form (4k+1)*2^j which are not a sum of two squares.

21, 33, 42, 57, 66, 69, 77, 84, 93, 105, 114, 129, 132, 133, 138, 141, 154, 161, 165, 168, 177, 186, 189, 201, 209, 210, 213, 217, 228, 237, 249, 253, 258, 264, 266, 273, 276, 282, 285, 297, 301, 308, 309, 321, 322, 329, 330, 336, 341, 345, 354, 357, 372 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	EXAMPLE	`42 is there because it's (45+1)2^1 and is not a sum of two squares.`
	CROSSREFS	`Cf. A001481, A084109, A091072, A120772.` `Sequence in context: A075110 A181677 A036382 * A141249 A026068 A176945` `Adjacent sequences: A119970 A119971 A119972 * A119974 A119975 A119976`
	KEYWORD	`easy,nonn`
	AUTHOR	`Alford Arnold (Alford1940(AT)aol.com), Jun 03 2006`
	EXTENSIONS	`More terms from Don Reble (djr(AT)nk.ca), Jul 24 2006`

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Last modified February 16 08:59 EST 2012. Contains 205903 sequences.