A244394 - cp's OEIS frontend

A244394 Consider a number n with m decimal digits, m>1. The sequence lists the numbers n such that the prefix of length m-1 and the suffix of length m-1 both have the same sum of divisors.

n	a(n)
1	11
2	22
3	33
4	44
5	55
6	66
7	77
8	88
9	99
10	111
11	222
12	333
13	335
14	444
15	534
16	551
17	555
18	579
19	589
20	666
21	682
22	777
23	888
24	954
25	956
26	999
27	1102
28	1111
29	2138
30	2204
31	2222
32	2246
33	2649
34	3190
35	3333
36	4354
37	4408
38	4428
39	4444
40	5332
41	5376
42	5555
43	5644
44	5925
45	6294
46	6666
47	6933
48	7480
49	7528

[11, 22, 33, 44, 55, 66, 77, 88, 99, 111, 222, 333, 335, 444, 534, 551, 555, 579, 589, 666, 682, 777, 888, 954, 956, 999, 1102, 1111, 2138, 2204, 2222, 2246, 2649, 3190, 3333, 4354, 4408, 4428, 4444, 5332, 5376, 5555, 5644, 5925, 6294, 6666, 6933, 7480, 7528]

cp's OEIS Frontend

A244394 Consider a number n with m decimal digits, m>1. The sequence lists the numbers n such that the prefix of length m-1 and the suffix of length m-1 both have the same sum of divisors.

Table of values

List of values