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iban n.  and  tau n.

First numbers that belong to both sets:

1, 2, 12, 24, 40, 72, 104, 204, 240, 344, 372, 424, 441, 444, 472, 712, 720, 1040, 1044, 1112, 1200, 1212, 1224, 1304, 1344, 1440, 2000, 2004, 2104, 2124, 2172, 2240, 2320, 2340, 2344, 2412, 2700, 2724, 2772, 3012, 3042, 3112, 3120, 3204, 3240, 3272, 3324, 3372, 3420, 3440, 3704, 3712, 3744, 4024, 4044, 4072, 4140, 4224, 4240, 4320, 4404, 4720, 4744, 7040, 7044, 7120, 7212, 7272, 7404, 7440, 7704, 7740, 10000, 10072, 10112, 10272, 10304, 10312, 10320, 10424, 11040, 11120, 11244, 11272, 11304, 11340, 11412, 11424, 11440, 11724, 12000, 12024, 12240, 12321, 12344, 12372, 12424, 12472, 12720, 14000, 14004, 14024, 14072, 14172, 14220, 14244, 14304, 14312, 14320, 14412, 14720, 14724, 14772, 17024, 17040, 17124, 17144, 17224, 17244, 17412, 17472, 17704, 17772, 20004, 20024, 20124, 20240, 20312, 20340, 20344, 20400, 20412, 20720, 20744, 20772, 21024, 21040, 21120, 21204, 21272, 21304, 21324, 21444, 21704, 22000, 22024, 22104, 22144, 22212, 22312, 22320, 22404, 22424, 22744, 23040, 23172, 23224, 23272, 23400, 23412, 23424, 23440, 23704, 23712, 23724, 23744, 24012, 24204, 24240, 24300, 24324, 24372, 24444, 24704, 24712, 24720, 27012, 27112, 27120, 27204, 27304, 27372, 27440, 27444, 27704, 40024, 40072, 40104, 40140, 40212, 40224, 40240, 40312, 40320, 40344, 40401, 40472, 40720, 41004, 41040, 41112, 41220, 41224, 41344, 41400, 41724, 42000, 42112, 42144, 42204, 42324, 42372, 42424, 42472, 42720, 43020, 43104, 43144, 43272, 43304, 43404, 43440, 43704, 44024, 44124, 44240, 44244, 44400, 44412, 44424, 44720, 44724, 47004, 47040, 47120, 47172, 47224, 47340, 47440, 47712, 47744, 47772, 70000, 70020, 70024, 70212, 70272, 70320, 70344, 70404, 70424, 70712, 71040, 71120, 71124, 71144, 71244, 71440, 71442, 71704, 71712, 71772, 72104, 72240, 72320, 72344, 72444, 72472, 72720, 73024, 73040, 73044, 73200, 73212, 73344, 73404, 73440, 74000, 74112, 74124.

Some larger examples :