A034047 Numbers that are primitively or imprimitively represented by x^2+y^2+z^2, but not both.

0, 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 14, 16, 17, 19, 20, 21, 22, 24, 26, 29, 30, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 46, 48, 51, 52, 53, 56, 57, 58, 59, 61, 62, 64, 65, 66, 67, 68, 69, 70, 72, 73, 74, 76, 77, 78, 80, 82, 83, 84, 85, 86, 88, 89, 91, 93

Offset

1,3

Links

Table of n, a(n) for n=1..69.

Formula

Union of A034046 and A034047 is A000378. Union of A034044 and A034045 is A034047. Numbers that are in A000378 and either squarefree or congruent to 0 mod 4. - Ray Chandler, Sep 05 2004

Crossrefs

Cf. A000378, A004215, A047449, A034043-A034046.

Sequence in context: A039154 A039083 A178596 * A047424 A094942 A243494

Adjacent sequences: A034044 A034045 A034046 * A034048 A034049 A034050

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved