A248398 Noncongruent squarefree numbers n with A248394(n)/d(n) = -1, where d(n) = A000005(n).

11, 19, 35, 67, 91, 105, 115, 123, 129, 179, 195, 201, 227, 235, 249, 273, 347, 393, 403, 419, 427, 435, 473, 483, 563, 611, 635, 683, 691, 705, 715, 739, 753, 779, 787, 795, 817, 843, 851, 993, 1051, 1115, 1121, 1123, 1177, 1209, 1265, 1347, 1401, 1435, 1441

Offset: 1

Author

N. J. A. Sloane, Oct 20 2014

Keywords

• nonn

Links

• J. B. Tunnell, A classical Diophantine problem and modular forms of weight 3/2, Invent. Math., 72 (1983), 323-334.

Crossrefs

Cf. A000005, A003273, A165564, A248394, A248395, A248397-A248407.

Extensions

More terms from Amiram Eldar, Oct 13 2019