A086697 - cp's OEIS frontend

A086697 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.

n	a(n)
1	4
2	6
3	9
4	14
5	26
6	34
7	39
8	46
9	49
10	69
11	74
12	86
13	94
14	134
15	146
16	169
17	194
18	214
19	226
20	249
21	274
22	314
23	326
24	334
25	339
26	346
27	386
28	394
29	446
30	469
31	514
32	526
33	586
34	614
35	626
36	634
37	649
38	669
39	674
40	694
41	734
42	746
43	749
44	794
45	849
46	869
47	886
48	914
49	926
50	934
51	939
52	949
53	974
54	1169
55	1214

[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]

cp's OEIS Frontend

A086697 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.

Table of values

List of values