A216500 Numbers which are simultaneously of the form x^2+y^2, x^2+2y^2, x^2+3y^2, x^2+7y^2, all with x>=0, y>=0.

1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 193, 196, 225, 256, 289, 324, 337, 361, 400, 441, 457, 484, 529, 576, 625, 673, 676, 729, 772, 784, 841, 900, 961, 1009, 1024, 1033, 1089, 1129, 1156, 1201, 1225, 1296, 1297, 1348, 1369, 1444, 1521, 1600, 1681, 1737, 1764, 1801, 1828, 1849, 1873, 1936, 2017

Offset

1,2

Links

Table of n, a(n) for n=1..60.

Crossrefs

Union of A216451 and the squares (A000290).

Sequence in context: A093837 A194148 A162497 * A370785 A069821 A331221

Adjacent sequences: A216497 A216498 A216499 * A216501 A216502 A216503

Keyword

nonn

Author

V. Raman, Sep 07 2012

Extensions

Edited by N. J. A. Sloane, Sep 11 2012

Status

approved