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oban n.  and  palindromic n.

First numbers that belong to both sets:

3, 5, 6, 7, 8, 9, 11, 33, 55, 66, 77, 88, 99, 303, 313, 323, 333, 353, 363, 373, 383, 393, 505, 515, 525, 535, 555, 565, 575, 585, 595, 606, 616, 626, 636, 656, 666, 676, 686, 696, 707, 717, 727, 737, 757, 767, 777, 787, 797, 808, 818, 828, 838, 858, 868, 878, 888, 898, 909, 919, 929, 939, 959, 969, 979, 989, 999.