A372335 - cp's OEIS frontend

A372335 For a positive number k, let L(k) denote the list consisting of k followed by the prime factors of k, with repetition, in nondecreasing order; sequence gives composite k such that the digits of L(k) alternate being larger than and then smaller than the previous digit.

n	a(n)
1	14
2	15
3	78
4	161
5	591
6	1214
7	1317
8	1318
9	1326
10	1407
11	1418
12	1438
13	1506
14	1509
15	1514
16	1527
17	1538
18	1618
19	1626
20	1646
21	1658
22	1703
23	1714
24	1718
25	1734
26	1739
27	1758
28	1814
29	1834
30	1838
31	1839
32	1857
33	1858
34	1934
35	1938
36	2307
37	2427
38	2509
39	2517
40	2534
41	2535
42	2715
43	2757
44	2758
45	2869
46	2958
47	3419
48	3439
49	3514
50	3523

[14, 15, 78, 161, 591, 1214, 1317, 1318, 1326, 1407, 1418, 1438, 1506, 1509, 1514, 1527, 1538, 1618, 1626, 1646, 1658, 1703, 1714, 1718, 1734, 1739, 1758, 1814, 1834, 1838, 1839, 1857, 1858, 1934, 1938, 2307, 2427, 2509, 2517, 2534, 2535, 2715, 2757, 2758, 2869, 2958, 3419, 3439, 3514, 3523]

cp's OEIS Frontend

A372335 For a positive number k, let L(k) denote the list consisting of k followed by the prime factors of k, with repetition, in nondecreasing order; sequence gives composite k such that the digits of L(k) alternate being larger than and then smaller than the previous digit.

Table of values

List of values