A340488 - cp's OEIS frontend

A340488 a(n+1) = XOR(a(n),y) for n>=1, where y is the number of m < n such that a(m) = a(n); a(1)=0.

n	a(n)
1	0
2	0
3	1
4	1
5	0
6	2
7	2
8	3
9	3
10	2
11	0
12	3
13	1
14	3
15	0
16	4
17	4
18	5
19	5
20	4
21	6
22	6
23	7
24	7
25	6
26	4
27	7
28	5
29	7
30	4
31	0
32	5
33	6
34	5
35	1
36	2
37	1
38	5
39	0
40	6
41	2
42	6
43	3
44	7
45	3
46	6
47	0
48	7
49	2
50	7
51	1
52	4
53	1
54	7
55	0
56	8
57	8
58	9
59	9
60	8
61	10
62	10
63	11
64	11
65	10
66	8
67	11
68	9
69	11
70	8
71	12
72	12
73	13
74	13
75	12
76	14
77	14

[0, 0, 1, 1, 0, 2, 2, 3, 3, 2, 0, 3, 1, 3, 0, 4, 4, 5, 5, 4, 6, 6, 7, 7, 6, 4, 7, 5, 7, 4, 0, 5, 6, 5, 1, 2, 1, 5, 0, 6, 2, 6, 3, 7, 3, 6, 0, 7, 2, 7, 1, 4, 1, 7, 0, 8, 8, 9, 9, 8, 10, 10, 11, 11, 10, 8, 11, 9, 11, 8, 12, 12, 13, 13, 12, 14, 14]

cp's OEIS Frontend

A340488 a(n+1) = XOR(a(n),y) for n>=1, where y is the number of m < n such that a(m) = a(n); a(1)=0.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	1
5	0
6	2
7	2
8	3
9	3
10	2
11	0
12	3
13	1
14	3
15	0
16	4
17	4
18	5
19	5
20	4
21	6
22	6
23	7
24	7
25	6
26	4
27	7
28	5
29	7
30	4
31	0
32	5
33	6
34	5
35	1
36	2
37	1
38	5
39	0
40	6
41	2
42	6
43	3
44	7
45	3
46	6
47	0
48	7
49	2
50	7
51	1
52	4
53	1
54	7
55	0
56	8
57	8
58	9
59	9
60	8
61	10
62	10
63	11
64	11
65	10
66	8
67	11
68	9
69	11
70	8
71	12
72	12
73	13
74	13
75	12
76	14
77	14

n	a(n)
1	0
2	0
3	1
4	1
5	0
6	2
7	2
8	3
9	3
10	2
11	0
12	3
13	1
14	3
15	0
16	4
17	4
18	5
19	5
20	4
21	6
22	6
23	7
24	7
25	6
26	4
27	7
28	5
29	7
30	4
31	0
32	5
33	6
34	5
35	1
36	2
37	1
38	5
39	0
40	6
41	2
42	6
43	3
44	7
45	3
46	6
47	0
48	7
49	2
50	7
51	1
52	4
53	1
54	7
55	0
56	8
57	8
58	9
59	9
60	8
61	10
62	10
63	11
64	11
65	10
66	8
67	11
68	9
69	11
70	8
71	12
72	12
73	13
74	13
75	12
76	14
77	14

n	a(n)
1	0
2	0
3	1
4	1
5	0
6	2
7	2
8	3
9	3
10	2
11	0
12	3
13	1
14	3
15	0
16	4
17	4
18	5
19	5
20	4
21	6
22	6
23	7
24	7
25	6
26	4
27	7
28	5
29	7
30	4
31	0
32	5
33	6
34	5
35	1
36	2
37	1
38	5
39	0
40	6
41	2
42	6
43	3
44	7
45	3
46	6
47	0
48	7
49	2
50	7
51	1
52	4
53	1
54	7
55	0
56	8
57	8
58	9
59	9
60	8
61	10
62	10
63	11
64	11
65	10
66	8
67	11
68	9
69	11
70	8
71	12
72	12
73	13
74	13
75	12
76	14
77	14