A169813 - cp's OEIS frontend

A169813 a(n) = n XOR sigma(n), where sigma(n) is the number of divisors of n, A000203.

n	a(n)
1	0
2	1
3	7
4	3
5	3
6	10
7	15
8	7
9	4
10	24
11	7
12	16
13	3
14	22
15	23
16	15
17	3
18	53
19	7
20	62
21	53
22	50
23	15
24	36
25	6
26	48
27	51
28	36
29	3
30	86
31	63
32	31
33	17
34	20
35	19
36	127
37	3
38	26
39	31
40	114
41	3
42	74
43	7
44	120
45	99
46	102
47	31
48	76
49	8
50	111
51	123
52	86
53	3
54	78
55	127
56	64
57	105
58	96
59	7
60	148
61	3
62	94
63	87
64	63
65	21
66	210
67	7
68	58
69	37
70	214
71	15
72	139
73	3
74	56

[0, 1, 7, 3, 3, 10, 15, 7, 4, 24, 7, 16, 3, 22, 23, 15, 3, 53, 7, 62, 53, 50, 15, 36, 6, 48, 51, 36, 3, 86, 63, 31, 17, 20, 19, 127, 3, 26, 31, 114, 3, 74, 7, 120, 99, 102, 31, 76, 8, 111, 123, 86, 3, 78, 127, 64, 105, 96, 7, 148, 3, 94, 87, 63, 21, 210, 7, 58, 37, 214, 15, 139, 3, 56]

cp's OEIS Frontend

A169813 a(n) = n XOR sigma(n), where sigma(n) is the number of divisors of n, A000203.

Table of values

List of values

n	a(n)
1	0
2	1
3	7
4	3
5	3
6	10
7	15
8	7
9	4
10	24
11	7
12	16
13	3
14	22
15	23
16	15
17	3
18	53
19	7
20	62
21	53
22	50
23	15
24	36
25	6
26	48
27	51
28	36
29	3
30	86
31	63
32	31
33	17
34	20
35	19
36	127
37	3
38	26
39	31
40	114
41	3
42	74
43	7
44	120
45	99
46	102
47	31
48	76
49	8
50	111
51	123
52	86
53	3
54	78
55	127
56	64
57	105
58	96
59	7
60	148
61	3
62	94
63	87
64	63
65	21
66	210
67	7
68	58
69	37
70	214
71	15
72	139
73	3
74	56

n	a(n)
1	0
2	1
3	7
4	3
5	3
6	10
7	15
8	7
9	4
10	24
11	7
12	16
13	3
14	22
15	23
16	15
17	3
18	53
19	7
20	62
21	53
22	50
23	15
24	36
25	6
26	48
27	51
28	36
29	3
30	86
31	63
32	31
33	17
34	20
35	19
36	127
37	3
38	26
39	31
40	114
41	3
42	74
43	7
44	120
45	99
46	102
47	31
48	76
49	8
50	111
51	123
52	86
53	3
54	78
55	127
56	64
57	105
58	96
59	7
60	148
61	3
62	94
63	87
64	63
65	21
66	210
67	7
68	58
69	37
70	214
71	15
72	139
73	3
74	56

n	a(n)
1	0
2	1
3	7
4	3
5	3
6	10
7	15
8	7
9	4
10	24
11	7
12	16
13	3
14	22
15	23
16	15
17	3
18	53
19	7
20	62
21	53
22	50
23	15
24	36
25	6
26	48
27	51
28	36
29	3
30	86
31	63
32	31
33	17
34	20
35	19
36	127
37	3
38	26
39	31
40	114
41	3
42	74
43	7
44	120
45	99
46	102
47	31
48	76
49	8
50	111
51	123
52	86
53	3
54	78
55	127
56	64
57	105
58	96
59	7
60	148
61	3
62	94
63	87
64	63
65	21
66	210
67	7
68	58
69	37
70	214
71	15
72	139
73	3
74	56