A337523 - cp's OEIS frontend

A337523 Numbers of the form ab such that uphi(ab) = a*b where ab is the concatenation of a and b.

n	a(n)
1	18
2	26
3	68
4	87
5	154
6	165
7	209
8	572
9	846
10	1434
11	4840
12	5476
13	5828
14	5936
15	6499
16	6572
17	7772
18	8540
19	8727
20	10088
21	10864
22	11772
23	12867
24	15088
25	20099
26	20584
27	20881
28	21672
29	22440
30	27348
31	29748
32	29920
33	30576
34	32390
35	35640
36	36580
37	37200
38	37449
39	38430
40	39600
41	40548
42	42984

[18, 26, 68, 87, 154, 165, 209, 572, 846, 1434, 4840, 5476, 5828, 5936, 6499, 6572, 7772, 8540, 8727, 10088, 10864, 11772, 12867, 15088, 20099, 20584, 20881, 21672, 22440, 27348, 29748, 29920, 30576, 32390, 35640, 36580, 37200, 37449, 38430, 39600, 40548, 42984]

cp's OEIS Frontend

A337523 Numbers of the form ab such that uphi(ab) = a*b where ab is the concatenation of a and b.

Table of values

List of values