A361614 - cp's OEIS frontend

A361614 Set a(1)=0 and a(2)=1. For n > 1, if a(n) has already appeared in the sequence, then a(n+1) = number of steps since its first appearance. If a(n) has not appeared before, search instead for a(n)-1, then a(n)-2, etc., until you find a number that has appeared before.

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

[0, 1, 1, 1, 2, 3, 1, 5, 2, 4, 4, 1, 10, 5, 6, 7, 1, 15, 5, 11, 7, 5, 14, 3, 18, 7, 10, 14, 5, 21, 5, 23, 2, 28, 2, 30, 2, 32, 2, 34, 2, 36, 2, 38, 2, 40, 2, 42, 2, 44, 2, 46, 2, 48, 2, 50, 2, 52, 2, 54, 2, 56, 2, 58, 2, 60, 2, 62, 2, 64, 2, 66, 2, 68, 2, 70, 2]

cp's OEIS Frontend

A361614 Set a(1)=0 and a(2)=1. For n > 1, if a(n) has already appeared in the sequence, then a(n+1) = number of steps since its first appearance. If a(n) has not appeared before, search instead for a(n)-1, then a(n)-2, etc., until you find a number that has appeared before.

Table of values

List of values

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

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

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