A214371 - cp's OEIS frontend

A214371 If a(n) has not yet been defined then set a(n) = least positive integer that has not yet occurred; also if n>1 and a(n+a(n)) has not yet been defined then set a(n+a(n)) = a(n).

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

[1, 2, 3, 2, 4, 3, 5, 6, 4, 7, 8, 5, 4, 6, 9, 10, 7, 11, 8, 6, 12, 13, 14, 9, 15, 10, 8, 16, 11, 17, 18, 19, 12, 20, 13, 10, 14, 21, 22, 15, 23, 24, 25, 16, 12, 10, 17, 13, 18, 26, 19, 27, 28, 20, 15, 10, 12, 29, 21, 16, 22, 30, 31, 23, 32, 24, 18, 25, 12, 19, 33]

cp's OEIS Frontend

A214371 If a(n) has not yet been defined then set a(n) = least positive integer that has not yet occurred; also if n>1 and a(n+a(n)) has not yet been defined then set a(n+a(n)) = a(n).

Table of values

List of values

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

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

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