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hex n.  and  pernicious n.

First numbers that belong to both sets:

7, 19, 37, 61, 91, 127, 217, 271, 331, 397, 631, 721, 817, 919, 1027, 1261, 1387, 1657, 1801, 2269, 2437, 3169, 3367, 3781, 4219, 4681, 4921, 5167, 5419, 5677, 6211, 6769, 7057, 8269, 9241, 9577, 11347, 12097, 12481, 12871, 14077, 16207, 16651, 17101, 18019, 18487, 18961, 22447, 24571, 25117, 27937, 28519, 31519, 32761, 37297, 38647, 43561, 49537, 50311, 52669, 54271, 56719, 58381, 60919, 65269, 66157, 69769, 71611, 84169, 90307, 103231, 104347, 105469, 106597, 111169, 112327, 113491, 114661, 118207, 121807, 127927, 131671, 132931, 134197, 135469, 140617, 148519, 149857, 152551, 156637, 160777, 162169, 167797, 169219, 177877, 183769, 186751, 188251, 189757, 194311, 197377, 198919, 203581, 206719, 209881, 213067, 224407, 234361, 241117, 246247, 249697, 251431, 253171, 254917, 258427, 260191, 261961, 263737, 267307, 270901, 272707, 283669, 289231, 298621, 306241, 310087, 317851, 319807, 325711, 327691, 339697, 343747, 347821, 349867, 351919, 353977, 356041, 368551, 370657, 372769, 374887, 381277, 383419, 385567, 389881, 425257, 427519, 432061, 443521, 445831, 448147, 450469, 455131, 459817, 464527, 466891, 495727, 498169, 503071, 512947, 517921, 520417, 525427, 527941, 530461, 548269, 550837, 555991, 561169, 576847, 579481, 598087, 606151, 619711, 622441, 627919, 650071, 652867, 655669, 672607, 678301, 707131, 710047, 727669, 733591, 736561, 748501, 751501, 763561, 775717, 787969, 791047, 800317, 806527, 812761, 815887, 819019, 831607, 834769, 847477, 853867, 857071, 866719, 869947, 879667, 882919, 892711, 899269, 905851, 912457, 915769, 929077, 955981, 959371, 986707, 990151, 997057, 1021417, 1028431, 1035469, 1038997, 1063861, 1071019, 1074607, 1078201, 1081801, 1085407, 1089019, 1103527, 1118131, 1166257, 1173751, 1177507, 1200169, 1207771, 1211581, 1234567, 1238419, 1242277, 1246141, 1250011, 1253887, 1265551, 1269451, 1273357, 1277269, 1289041, 1296919, 1300867, 1304821, 1308781, 1312747, 1320697, 1336669, 1352737, 1356769, 1360807, 1377019, 1389241, 1393327, 1397419, 1401517, 1417969, 1442827, 1455337, 1476307, 1484737, 1493191, 1501669, 1510171, 1518697, 1531531, 1544419, 1548727, 1553041, 1561687, 1600891, 1605277, 1609669, 1631719.

Some larger examples :