1, 3, 7, 21, 43, 73, 111, 127, 141, 171, 201, 211, 223, 241, 273, 303, 307, 321, 327, 421, 427, 477, 717, 723, 727, 741, 777, 1011, 1021, 1023, 1041, 1101, 1107, 1117, 1123, 1147, 1201, 1203, 1303, 1323, 1401, 1417, 1441, 1471, 1473, 1701, 1711, 1723, 1771, 1773, 1777, 2001, 2023, 2121, 2127, 2173, 2211, 2217, 2221, 2271, 2277, 2301, 2311, 2317, 2323, 2343, 2403, 2407, 2427, 2473, 2773, 3003, 3007, 3027, 3073, 3111, 3121, 3123, 3171, 3223, 3243, 3301, 3307, 3403, 3411, 3427, 3477, 3717, 3721, 3727, 3747, 3771, 4003, 4023, 4041, 4107, 4173, 4201, 4203, 4207, 4227, 4321, 4377, 4441, 4443, 4717, 4741, 4773, 7003, 7041, 7047, 7077, 7101, 7111, 7171, 7173, 7207, 7311, 7321, 7341, 7371, 7377, 7401, 7443, 7447, 7471, 7701, 7711, 7717, 10003, 10017, 10041, 10071, 10111, 10117, 10143, 10147, 10173, 10221, 10311, 10317, 10321, 10341, 10411, 10417, 10441, 10443, 10471, 10723, 10747, 10773, 11011, 11017, 11047, 11073, 11077, 11173, 11217, 11223, 11227, 11247, 11301, 11323, 11341, 11343, 11371, 11373, 11377, 11407, 11427, 11707, 11721, 12007, 12103, 12117, 12121, 12141, 12201, 12207, 12223, 12243, 12301, 12307, 12321, 12373, 12411, 12417, 12427, 12711, 12741, 12777, 14007, 14017, 14041, 14073, 14211, 14217, 14247, 14307, 14317, 14347, 14407, 14427, 14443, 14473, 14721, 17001, 17011, 17017, 17047, 17103, 17127, 17173, 17211, 17221, 17223, 17341, 17401, 17473, 17703, 20017, 20043, 20071, 20077, 20101, 20103, 20121, 20203, 20227, 20271, 20307, 20341, 20371, 20403, 20773, 21021, 21027, 21043, 21073, 21111, 21147, 21177, 21211, 21223, 21307, 21327, 21373, 21411, 21421, 21471, 21703, 21717, 21721, 21771, 22017, 22147, 22177, 22227, 22327, 22371, 22377, 22401, 22411, 22417, 22471, 22473, 22701, 22711, 22743, 23007, 23041, 23101, 23173, 23271, 23311, 23323, 23341, 23343, 23373, 23377.

774043, 774147, 774241, 774441, 774471, 774703, 774723, 777001, 777003, 777127, 777141, 777177, 777201, 777241, 777247, 777307, 777421, 777723, 777727, 777777.