A003815 - cp's OEIS frontend

A003815 a(0) = 0, a(n) = a(n-1) XOR n.

n	a(n)
0	0
1	1
2	3
3	0
4	4
5	1
6	7
7	0
8	8
9	1
10	11
11	0
12	12
13	1
14	15
15	0
16	16
17	1
18	19
19	0
20	20
21	1
22	23
23	0
24	24
25	1
26	27
27	0
28	28
29	1
30	31
31	0
32	32
33	1
34	35
35	0
36	36
37	1
38	39
39	0
40	40
41	1
42	43
43	0
44	44
45	1
46	47
47	0
48	48
49	1
50	51
51	0
52	52
53	1
54	55
55	0
56	56
57	1
58	59
59	0
60	60
61	1
62	63
63	0
64	64
65	1
66	67
67	0

[0, 1, 3, 0, 4, 1, 7, 0, 8, 1, 11, 0, 12, 1, 15, 0, 16, 1, 19, 0, 20, 1, 23, 0, 24, 1, 27, 0, 28, 1, 31, 0, 32, 1, 35, 0, 36, 1, 39, 0, 40, 1, 43, 0, 44, 1, 47, 0, 48, 1, 51, 0, 52, 1, 55, 0, 56, 1, 59, 0, 60, 1, 63, 0, 64, 1, 67, 0]

cp's OEIS Frontend

A003815 a(0) = 0, a(n) = a(n-1) XOR n.

Table of values

List of values

n	a(n)
0	0
1	1
2	3
3	0
4	4
5	1
6	7
7	0
8	8
9	1
10	11
11	0
12	12
13	1
14	15
15	0
16	16
17	1
18	19
19	0
20	20
21	1
22	23
23	0
24	24
25	1
26	27
27	0
28	28
29	1
30	31
31	0
32	32
33	1
34	35
35	0
36	36
37	1
38	39
39	0
40	40
41	1
42	43
43	0
44	44
45	1
46	47
47	0
48	48
49	1
50	51
51	0
52	52
53	1
54	55
55	0
56	56
57	1
58	59
59	0
60	60
61	1
62	63
63	0
64	64
65	1
66	67
67	0

n	a(n)
0	0
1	1
2	3
3	0
4	4
5	1
6	7
7	0
8	8
9	1
10	11
11	0
12	12
13	1
14	15
15	0
16	16
17	1
18	19
19	0
20	20
21	1
22	23
23	0
24	24
25	1
26	27
27	0
28	28
29	1
30	31
31	0
32	32
33	1
34	35
35	0
36	36
37	1
38	39
39	0
40	40
41	1
42	43
43	0
44	44
45	1
46	47
47	0
48	48
49	1
50	51
51	0
52	52
53	1
54	55
55	0
56	56
57	1
58	59
59	0
60	60
61	1
62	63
63	0
64	64
65	1
66	67
67	0

n	a(n)
0	0
1	1
2	3
3	0
4	4
5	1
6	7
7	0
8	8
9	1
10	11
11	0
12	12
13	1
14	15
15	0
16	16
17	1
18	19
19	0
20	20
21	1
22	23
23	0
24	24
25	1
26	27
27	0
28	28
29	1
30	31
31	0
32	32
33	1
34	35
35	0
36	36
37	1
38	39
39	0
40	40
41	1
42	43
43	0
44	44
45	1
46	47
47	0
48	48
49	1
50	51
51	0
52	52
53	1
54	55
55	0
56	56
57	1
58	59
59	0
60	60
61	1
62	63
63	0
64	64
65	1
66	67
67	0