A248399 Noncongruent squarefree numbers n with A248394(n)/d(n) = 2, where d(n) = A000005(n).

73, 155, 185, 203, 241, 281, 329, 355, 545, 553, 579, 601, 627, 641, 697, 755, 763, 785, 865, 937, 1097, 1139, 1193, 1227, 1243, 1289, 1299, 1353, 1371, 1457, 1465, 1537, 1721, 1753, 1763, 1841, 1865, 1913, 1937, 1961, 2017, 2041, 2105, 2177, 2281, 2307, 2353

Offset

1,1

Links

Table of n, a(n) for n=1..47.

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.

Sequence in context: A124363 A044324 A044705 * A071844 A078856 A142326

Adjacent sequences: A248396 A248397 A248398 * A248400 A248401 A248402

Keyword

nonn

Author

N. J. A. Sloane, Oct 20 2014

Extensions

More terms from Amiram Eldar, Oct 13 2019

Status

approved