login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Numbers that are primitively or imprimitively represented by (x^2+xy+2y^2, x>=0, y>=0), but not both.
8

%I #7 Apr 30 2015 14:27:38

%S 1,2,9,11,14,16,18,22,23,25,28,36,37,43,46,49,50,53,58,71,72,74,77,79,

%T 81,86,98,99,100,106,107,109,116,121,126,127,134,137,142,144,149,151,

%U 154,158,161,162,163,169,193,196,197,198,200,203,207,211,214

%N Numbers that are primitively or imprimitively represented by (x^2+xy+2y^2, x>=0, y>=0), but not both.

%Y Cf. A034035-A034042.

%K nonn

%O 1,2

%A _N. J. A. Sloane_.

%E Definition corrected by _N. J. A. Sloane_, Apr 30 2015