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Search: id:A034021
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A034021 Numbers that are primitively but not imprimitively represented by x^2+xy+y^2. +0
1
1, 3, 7, 13, 19, 21, 31, 37, 39, 43, 57, 61, 67, 73, 79, 91, 93, 97, 103, 109, 111, 127, 129, 133, 139, 151, 157, 163, 181, 183, 193, 199, 201, 211, 217, 219, 223, 229, 237, 241, 247, 259, 271, 273, 277, 283, 291, 301, 307, 309, 313, 327, 331, 337 (list; graph; listen)
OFFSET

1,2

CROSSREFS

Cf. A034017, A003136, A045897.

Sequence in context: A076746 A118667 A034017 this_sequence A038978 A133387 A105399

Adjacent sequences: A034018 A034019 A034020 this_sequence A034022 A034023 A034024

KEYWORD

nonn

AUTHOR

njas

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Last modified July 25 02:12 EDT 2008. Contains 142294 sequences.


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