A046447 - cp's OEIS frontend

A046447 Apart from initial term, composite numbers with the property that the concatenation of their prime factors is a palindrome.

n	a(n)
1	1
2	4
3	8
4	9
5	16
6	25
7	27
8	32
9	39
10	49
11	64
12	69
13	81
14	119
15	121
16	125
17	128
18	129
19	159
20	219
21	243
22	249
23	256
24	259
25	329
26	339
27	343
28	403
29	429
30	469
31	507
32	512
33	625
34	669
35	679
36	729
37	795
38	1024
39	1207
40	1309
41	1329
42	1331
43	1533
44	1547
45	1587
46	1589
47	1703
48	2023
49	2048
50	2097
51	2187
52	2319

[1, 4, 8, 9, 16, 25, 27, 32, 39, 49, 64, 69, 81, 119, 121, 125, 128, 129, 159, 219, 243, 249, 256, 259, 329, 339, 343, 403, 429, 469, 507, 512, 625, 669, 679, 729, 795, 1024, 1207, 1309, 1329, 1331, 1533, 1547, 1587, 1589, 1703, 2023, 2048, 2097, 2187, 2319]

cp's OEIS Frontend

A046447 Apart from initial term, composite numbers with the property that the concatenation of their prime factors is a palindrome.

Table of values

List of values