Cap i cua
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111,111,111 x 111,111,111 = 12,345,678,987,654,321
101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 202, 212, 222,
232, 242, 252, 262, 272, 282, 292, 303, 313, 323, 333, 343, 353,
363, 373, 383, 393, 404, 414, 424, 434, 444, 454, 464, 474, 484,
494, 505, 515, 525, 535, 545, 555, 565, 575, 585, 595, 606, 616,
626, 636, 646, 656, 666, 676, 686, 696, 707, 717, 727, 737, 747,
757, 767, 777, 787, 797, 808, 818, 828, 838, 848, 858, 868, 878,
888, 898, 909, 919, 929, 939, 949, 959, 969, 979, 989, 999, 1001
[Números palindrómicos]
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