A025394 Numbers that are the sum of 4 distinct nonzero squares in 10 or more ways.

270, 294, 318, 330, 342, 350, 351, 354, 366, 375, 378, 382, 390, 398, 399, 402, 406, 410, 414, 422, 426, 429, 430, 434, 435, 438, 441, 442, 446, 450, 455, 459, 462, 465, 466, 470, 471, 474, 478, 483, 486, 490, 494, 495, 498, 501, 506, 507, 510, 513, 515, 518, 519, 522

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Comments

The common sum of rows, columns and diagonals of magic squares whose entries are distinct squares must be terms of this sequence. - M. F. Hasler, Jul 22 2025

Links

• M. F. Hasler, Table of n, a(n) for n = 1..10000
• Index entries for sequences related to sums of squares

Crossrefs

Cf. A025443 (number of ways to write n as sum of 4 distinct nonzero squares).

Cf. A025385 (subsequence of terms with A025443(n) = 10 exactly),

Subsequence of A025375 (sums of 4 not necessarily distinct nonzero squares in at least 10 ways).

Formula

{n: A025443(n) >= 10}. - R. J. Mathar, Jun 15 2018