A034046 Numbers that are both primitively and imprimitively represented by x^2+y^2+z^2.

9, 18, 25, 27, 45, 49, 50, 54, 75, 81, 90, 98, 99, 117, 121, 125, 126, 147, 150, 153, 162, 169, 171, 189, 198, 225, 234, 242, 243, 245, 250, 261, 270, 275, 289, 294, 297, 306, 315, 325, 333, 338, 342, 350, 361, 363, 369, 378, 387, 405, 414, 425

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn

Crossrefs

Cf. A000378, A004215, A047449, A034043-A034047.

Formula

Union of A034046 and A034047 is A000378. Intersection of A047449 and A034043 is A034046. Numbers that are in A000378 and neither squarefree nor congruent to 0 mod 4. - Ray Chandler, Sep 05 2004