A031398 数据 无4k+3 的素因子,但方程 不存在 正整数解,
A031398 Squarefree n with no 4k+3 factors such that Pell equation x^2 - n y^2 = -1 is insoluble.
34, 146, 178, 194, 205, 221, 305, 377, 386, 410, 466, 482, 505, 514, 545, 562, 674, 689,
706, 745, 793, 802, 866, 890, 898, 905, 1154, 1186, 1202, 1205, 1234, 1282, 1345, 1346,
1394, 1405, 1469, 1513, 1517, 1537, 1538, 1717, 1762, 1802, 1858 , ...
但,数学家究竟是根据什么定理判断它们为 无正整数解的呢?
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