A075768 - cp's OEIS frontend

A075768 A Wallis pair (x,y) satisfies sigma(x^2) = sigma(y^2); sequence gives x's for indecomposable Wallis pairs with x < y (ordered by values of x).

n	a(n)
1	4
2	326
3	406
4	627
5	740
6	880
7	888
8	1026
9	1110
10	1284
11	1510
12	1528
13	2013
14	2072
15	3216
16	3260
17	3912
18	4866
19	4946
20	5064
21	5064
22	5829
23	7248
24	9768
25	10536
26	10686
27	11836
28	12122
29	13066
30	13398
31	13986
32	14248
33	14397
34	15000
35	15000
36	15430
37	15504
38	15544
39	15544
40	18582
41	18678

[4, 326, 406, 627, 740, 880, 888, 1026, 1110, 1284, 1510, 1528, 2013, 2072, 3216, 3260, 3912, 4866, 4946, 5064, 5064, 5829, 7248, 9768, 10536, 10686, 11836, 12122, 13066, 13398, 13986, 14248, 14397, 15000, 15000, 15430, 15504, 15544, 15544, 18582, 18678]

cp's OEIS Frontend

A075768 A Wallis pair (x,y) satisfies sigma(x^2) = sigma(y^2); sequence gives x's for indecomposable Wallis pairs with x < y (ordered by values of x).

Table of values

List of values