A378988 - cp's OEIS frontend

A378988 a(n) = 2*n XOR 1+sigma(n), where XOR is bitwise-xor, A003987.

n	a(n)
1	0
2	0
3	3
4	0
5	13
6	1
7	7
8	0
9	28
10	7
11	27
12	5
13	21
14	5
15	7
16	0
17	49
18	12
19	51
20	3
21	11
22	9
23	55
24	13
25	18
26	31
27	31
28	1
29	37
30	117
31	31
32	0
33	115
34	115
35	119
36	20
37	109
38	113
39	119
40	11
41	121
42	53
43	123
44	13
45	21
46	21
47	111
48	29
49	88
50	58
51	47
52	11
53	93
54	21
55	39
56	9
57	35
58	47
59	75
60	209
61	69
62	29
63	23
64	0
65	215
66	21
67	195
68	247
69	235
70	29
71	199
72	84
73	217
74	231
75	235
76	21
77	251
78	53
79	207

[0, 0, 3, 0, 13, 1, 7, 0, 28, 7, 27, 5, 21, 5, 7, 0, 49, 12, 51, 3, 11, 9, 55, 13, 18, 31, 31, 1, 37, 117, 31, 0, 115, 115, 119, 20, 109, 113, 119, 11, 121, 53, 123, 13, 21, 21, 111, 29, 88, 58, 47, 11, 93, 21, 39, 9, 35, 47, 75, 209, 69, 29, 23, 0, 215, 21, 195, 247, 235, 29, 199, 84, 217, 231, 235, 21, 251, 53, 207]

cp's OEIS Frontend

A378988 a(n) = 2*n XOR 1+sigma(n), where XOR is bitwise-xor, A003987.

Table of values

List of values

n	a(n)
1	0
2	0
3	3
4	0
5	13
6	1
7	7
8	0
9	28
10	7
11	27
12	5
13	21
14	5
15	7
16	0
17	49
18	12
19	51
20	3
21	11
22	9
23	55
24	13
25	18
26	31
27	31
28	1
29	37
30	117
31	31
32	0
33	115
34	115
35	119
36	20
37	109
38	113
39	119
40	11
41	121
42	53
43	123
44	13
45	21
46	21
47	111
48	29
49	88
50	58
51	47
52	11
53	93
54	21
55	39
56	9
57	35
58	47
59	75
60	209
61	69
62	29
63	23
64	0
65	215
66	21
67	195
68	247
69	235
70	29
71	199
72	84
73	217
74	231
75	235
76	21
77	251
78	53
79	207

n	a(n)
1	0
2	0
3	3
4	0
5	13
6	1
7	7
8	0
9	28
10	7
11	27
12	5
13	21
14	5
15	7
16	0
17	49
18	12
19	51
20	3
21	11
22	9
23	55
24	13
25	18
26	31
27	31
28	1
29	37
30	117
31	31
32	0
33	115
34	115
35	119
36	20
37	109
38	113
39	119
40	11
41	121
42	53
43	123
44	13
45	21
46	21
47	111
48	29
49	88
50	58
51	47
52	11
53	93
54	21
55	39
56	9
57	35
58	47
59	75
60	209
61	69
62	29
63	23
64	0
65	215
66	21
67	195
68	247
69	235
70	29
71	199
72	84
73	217
74	231
75	235
76	21
77	251
78	53
79	207

n	a(n)
1	0
2	0
3	3
4	0
5	13
6	1
7	7
8	0
9	28
10	7
11	27
12	5
13	21
14	5
15	7
16	0
17	49
18	12
19	51
20	3
21	11
22	9
23	55
24	13
25	18
26	31
27	31
28	1
29	37
30	117
31	31
32	0
33	115
34	115
35	119
36	20
37	109
38	113
39	119
40	11
41	121
42	53
43	123
44	13
45	21
46	21
47	111
48	29
49	88
50	58
51	47
52	11
53	93
54	21
55	39
56	9
57	35
58	47
59	75
60	209
61	69
62	29
63	23
64	0
65	215
66	21
67	195
68	247
69	235
70	29
71	199
72	84
73	217
74	231
75	235
76	21
77	251
78	53
79	207