A182108 - cp's OEIS frontend

A182108 Odd composite numbers in successive intervals [2^i +1 .. 2^(i+1) -1] i=1,2,3... such that there are only composite symmetric XOR couples in either the original interval or any recursively halved interval that contains them.

n	a(n)
1	513
2	695
3	925
4	1177
5	1355
6	1395
7	1507
8	1681
9	1685
10	1687
11	1689
12	1819
13	1827
14	1893
15	1959
16	2043
17	2165
18	2169
19	2637
20	2651
21	2757
22	2875
23	2987
24	3159
25	3339
26	3417
27	3503
28	3649
29	3681
30	3743
31	3873
32	3963
33	3975
34	4041
35	4169
36	4353
37	4489
38	4767
39	4773
40	4805
41	4845
42	4881
43	5123

[513, 695, 925, 1177, 1355, 1395, 1507, 1681, 1685, 1687, 1689, 1819, 1827, 1893, 1959, 2043, 2165, 2169, 2637, 2651, 2757, 2875, 2987, 3159, 3339, 3417, 3503, 3649, 3681, 3743, 3873, 3963, 3975, 4041, 4169, 4353, 4489, 4767, 4773, 4805, 4845, 4881, 5123]

cp's OEIS Frontend

A182108 Odd composite numbers in successive intervals [2^i +1 .. 2^(i+1) -1] i=1,2,3... such that there are only composite symmetric XOR couples in either the original interval or any recursively halved interval that contains them.

Table of values

List of values