A382482 - cp's OEIS frontend

A382482 a(1) = 1. Let a(n) be the most recently defined term. At each step, check for an undefined term with index < n. If such a term exists, then where i is the earliest such index, set a(i) = a(n) - (n - i). If no such term exists, then where i is the first undefined index >= n + a(n), set a(i) = the smallest integer not yet used.

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

[1, 2, 2, 3, 4, 2, 5, 6, 5, 5, 4, 7, 6, 5, 8, 9, 8, 5, 10, 11, 11, 4, 13, 13, 12, 15, 6, 12, 7, 13, 8, 14, 17, 16, 7, 19, 16, 19, 21, 18, 8, 23, 20, 20, 7, 21, 8, 22, 25, 22, 11, 27, 22, 11, 29, 24, 24, 12, 23, 14, 24, 31, 16, 26, 33, 26, 28, 16, 26, 30, 35]

cp's OEIS Frontend

Table of values

List of values

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

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

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