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A086697
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Left-truncatable semiprimes, i.e. semiprimes in which repeatedly deleting the leftmost digit gives a semiprime at every step until a single digit semiprime remains.
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0
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4, 6, 9, 14, 26, 34, 39, 46, 49, 69, 74, 86, 94, 134, 146, 169, 194, 214, 226, 249, 274, 314, 326, 334, 339, 346, 386, 394, 446, 469, 514, 526, 586, 614, 626, 634, 649, 669, 674, 694, 734, 746, 749, 794, 849, 869, 886, 914, 926, 934, 939, 949, 974, 1169, 1214
(list; graph; refs; listen; history; internal format)
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