A343887 - cp's OEIS frontend

A343887 a(1) = 1. Thereafter if a(n) is a novel term, a(n+1) = number of prior terms > a(n). If a(n) has been seen already, a(n+1) = a(n) + smallest prior term (which, once used, cannot be used again).

n	a(n)
1	1
2	0
3	1
4	1
5	2
6	0
7	1
8	1
9	2
10	3
11	0
12	1
13	1
14	2
15	3
16	5
17	0
18	2
19	2
20	4
21	1
22	3
23	4
24	6
25	0
26	3
27	3
28	6
29	9
30	0
31	3
32	3
33	6
34	9
35	12
36	0
37	4
38	4
39	8
40	3
41	7
42	4
43	7
44	11
45	1
46	5
47	6
48	11
49	16
50	0
51	6
52	6
53	12
54	18
55	0
56	6
57	6
58	12
59	18
60	24
61	0
62	6
63	6
64	12
65	18
66	25
67	0
68	7
69	7
70	14
71	6
72	13
73	7
74	13
75	20
76	2
77	10
78	16
79	18
80	27
81	0

[1, 0, 1, 1, 2, 0, 1, 1, 2, 3, 0, 1, 1, 2, 3, 5, 0, 2, 2, 4, 1, 3, 4, 6, 0, 3, 3, 6, 9, 0, 3, 3, 6, 9, 12, 0, 4, 4, 8, 3, 7, 4, 7, 11, 1, 5, 6, 11, 16, 0, 6, 6, 12, 18, 0, 6, 6, 12, 18, 24, 0, 6, 6, 12, 18, 25, 0, 7, 7, 14, 6, 13, 7, 13, 20, 2, 10, 16, 18, 27, 0]

cp's OEIS Frontend

A343887 a(1) = 1. Thereafter if a(n) is a novel term, a(n+1) = number of prior terms > a(n). If a(n) has been seen already, a(n+1) = a(n) + smallest prior term (which, once used, cannot be used again).

Table of values

List of values

n	a(n)
1	1
2	0
3	1
4	1
5	2
6	0
7	1
8	1
9	2
10	3
11	0
12	1
13	1
14	2
15	3
16	5
17	0
18	2
19	2
20	4
21	1
22	3
23	4
24	6
25	0
26	3
27	3
28	6
29	9
30	0
31	3
32	3
33	6
34	9
35	12
36	0
37	4
38	4
39	8
40	3
41	7
42	4
43	7
44	11
45	1
46	5
47	6
48	11
49	16
50	0
51	6
52	6
53	12
54	18
55	0
56	6
57	6
58	12
59	18
60	24
61	0
62	6
63	6
64	12
65	18
66	25
67	0
68	7
69	7
70	14
71	6
72	13
73	7
74	13
75	20
76	2
77	10
78	16
79	18
80	27
81	0

n	a(n)
1	1
2	0
3	1
4	1
5	2
6	0
7	1
8	1
9	2
10	3
11	0
12	1
13	1
14	2
15	3
16	5
17	0
18	2
19	2
20	4
21	1
22	3
23	4
24	6
25	0
26	3
27	3
28	6
29	9
30	0
31	3
32	3
33	6
34	9
35	12
36	0
37	4
38	4
39	8
40	3
41	7
42	4
43	7
44	11
45	1
46	5
47	6
48	11
49	16
50	0
51	6
52	6
53	12
54	18
55	0
56	6
57	6
58	12
59	18
60	24
61	0
62	6
63	6
64	12
65	18
66	25
67	0
68	7
69	7
70	14
71	6
72	13
73	7
74	13
75	20
76	2
77	10
78	16
79	18
80	27
81	0

n	a(n)
1	1
2	0
3	1
4	1
5	2
6	0
7	1
8	1
9	2
10	3
11	0
12	1
13	1
14	2
15	3
16	5
17	0
18	2
19	2
20	4
21	1
22	3
23	4
24	6
25	0
26	3
27	3
28	6
29	9
30	0
31	3
32	3
33	6
34	9
35	12
36	0
37	4
38	4
39	8
40	3
41	7
42	4
43	7
44	11
45	1
46	5
47	6
48	11
49	16
50	0
51	6
52	6
53	12
54	18
55	0
56	6
57	6
58	12
59	18
60	24
61	0
62	6
63	6
64	12
65	18
66	25
67	0
68	7
69	7
70	14
71	6
72	13
73	7
74	13
75	20
76	2
77	10
78	16
79	18
80	27
81	0