由 scsnake 於 星期六 五月 10, 2003 4:23 pm
n的解:
{19, 42, 65, 88, 111, 134, 157, 180, 203, 226, 249, 272, 295, 318, 341, 364, \
387, 410, 433, 456, 479, 502, 525, 548, 571, 594, 617, 640, 663, 686, 709, \
732, 755, 778, 801, 824, 847, 870, 893, 916, 939, 962, 985, 1008, 1031, 1054, \
1077, 1100, 1123, 1146, 1169, 1192, 1215, 1238, 1261, 1284, 1307, 1330, 1353, \
1376, 1399, 1422, 1445, 1468, 1491, 1514, 1537, 1560, 1583, 1606, 1629, 1652, \
1675, 1698, 1721, 1744, 1767, 1790, 1813, 1836, 1859, 1882, 1905, 1928, 1951, \
1974, 1997}
有87個,分數的GCD[分母,分子]都是23