A063248 - cp's OEIS frontend

A063248 Smallest composite number in base n which contains its largest proper factor as a substring.

n	a(n)
2	4
3	9
4	407
5	25
6	9
7	49
8	893
9	1387
10	15
11	121
12	23533
13	169
14	21
15	4717
16	10579
17	289
18	27
19	361
20	25
21	49
22	33
23	529
24	32437
25	61903
26	39
27	24523
28	35
29	841
30	45
31	961
32	39917
33	77
34	51
35	64993
36	111277
37	1369
38	57
39	91
40	99101
41	1681
42	49
43	1849
44	55
45	108389
46	69
47	2209
48	207133
49	139163

[4, 9, 407, 25, 9, 49, 893, 1387, 15, 121, 23533, 169, 21, 4717, 10579, 289, 27, 361, 25, 49, 33, 529, 32437, 61903, 39, 24523, 35, 841, 45, 961, 39917, 77, 51, 64993, 111277, 1369, 57, 91, 99101, 1681, 49, 1849, 55, 108389, 69, 2209, 207133, 139163]

cp's OEIS Frontend

A063248 Smallest composite number in base n which contains its largest proper factor as a substring.

Table of values

List of values