A248402 Noncongruent squarefree numbers n with A248394(n)/d(n) = -3, where d(n) = A000005(n).

107, 251, 283, 331, 547, 633, 643, 699, 737, 771, 883, 1041, 1147, 1163, 1307, 1459, 1483, 1497, 1523, 1531, 1619, 1627, 1699, 1793, 1883, 1915, 1923, 2049, 2179, 2251, 2283, 2361, 2363, 2411, 2427, 2433, 2443, 2467, 2539, 2651, 2843, 2971, 3091, 3147, 3187, 3203

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, A248394, A248395, A248397-A248406.

Extensions

More terms from Amiram Eldar, Oct 13 2019