A176589 - cp's OEIS frontend

A176589 Numbers k such that both concatenation of divisors of k and reverse concatenation of divisors of k are noncomposite.

n	a(n)
1	1
2	3
3	7
4	13
5	31
6	97
7	103
8	109
9	151
10	181
11	193
12	367
13	409
14	439
15	487
16	523
17	571
18	601
19	613
20	733
21	811
22	823
23	1069
24	1117
25	1279
26	1483
27	1489
28	1579
29	1597
30	1789
31	1831
32	1867
33	1897
34	1939
35	2161
36	2203
37	2239
38	2251
39	2269
40	2281
41	2437
42	2503
43	2509
44	2539
45	2659
46	2671
47	2689
48	2953

[1, 3, 7, 13, 31, 97, 103, 109, 151, 181, 193, 367, 409, 439, 487, 523, 571, 601, 613, 733, 811, 823, 1069, 1117, 1279, 1483, 1489, 1579, 1597, 1789, 1831, 1867, 1897, 1939, 2161, 2203, 2239, 2251, 2269, 2281, 2437, 2503, 2509, 2539, 2659, 2671, 2689, 2953]

cp's OEIS Frontend

A176589 Numbers k such that both concatenation of divisors of k and reverse concatenation of divisors of k are noncomposite.

Table of values

List of values