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Search: id:A119973
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A119973 Numbers of the form (4k+1)*2^j which are not a sum of two squares. +0
2
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; listen)
OFFSET

1,1

EXAMPLE

42 is there because it's (4*5+1)*2^1 and is not a sum of two squares.

CROSSREFS

Cf. A001481, A084109, A091072, A120772.

Sequence in context: A035137 A075110 A036382 this_sequence A141249 A026068 A070006

Adjacent sequences: A119970 A119971 A119972 this_sequence 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 November 29 12:46 EST 2009. Contains 167659 sequences.


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