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A257346
Numbers not of the form x^2+xy+2y^2.
2
3, 5, 6, 10, 12, 13, 15, 17, 19, 20, 21, 24, 26, 27, 30, 31, 33, 34, 35, 38, 39, 40, 41, 42, 45, 47, 48, 51, 52, 54, 55, 57, 59, 60, 61, 62, 65, 66, 68, 69, 70, 73, 75, 76, 78, 80, 82, 83, 84, 85, 87, 89, 90, 91, 93, 94, 95, 96, 97, 101
OFFSET
1,1
CROSSREFS
Complement of A028951.
Sequence in context: A065873 A072282 A028727 * A047327 A028927 A099190
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 30 2015
STATUS
approved