A362031 - cp's OEIS frontend

A362031 a(1) = 1; for n > 1, a(n) is number of terms in the first n-1 terms of the sequence that have the same number of prime factors, counted with multiplicity, as a(n-1).

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	2
7	3
8	4
9	1
10	4
11	2
12	5
13	6
14	3
15	7
16	8
17	1
18	5
19	9
20	4
21	5
22	10
23	6
24	7
25	11
26	12
27	2
28	13
29	14
30	8
31	3
32	15
33	9
34	10
35	11
36	16
37	1
38	6
39	12
40	4
41	13
42	17
43	18
44	5
45	19
46	20
47	6
48	14
49	15
50	16
51	2
52	21
53	17
54	22
55	18
56	7
57	23
58	24
59	3
60	25
61	19
62	26
63	20
64	8
65	9
66	21
67	22
68	23
69	27
70	10
71	24
72	4
73	25
74	26
75	27
76	11
77	28
78	12
79	13
80	29
81	30
82	14
83	28

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

cp's OEIS Frontend

A362031 a(1) = 1; for n > 1, a(n) is number of terms in the first n-1 terms of the sequence that have the same number of prime factors, counted with multiplicity, as a(n-1).

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	2
7	3
8	4
9	1
10	4
11	2
12	5
13	6
14	3
15	7
16	8
17	1
18	5
19	9
20	4
21	5
22	10
23	6
24	7
25	11
26	12
27	2
28	13
29	14
30	8
31	3
32	15
33	9
34	10
35	11
36	16
37	1
38	6
39	12
40	4
41	13
42	17
43	18
44	5
45	19
46	20
47	6
48	14
49	15
50	16
51	2
52	21
53	17
54	22
55	18
56	7
57	23
58	24
59	3
60	25
61	19
62	26
63	20
64	8
65	9
66	21
67	22
68	23
69	27
70	10
71	24
72	4
73	25
74	26
75	27
76	11
77	28
78	12
79	13
80	29
81	30
82	14
83	28

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	2
7	3
8	4
9	1
10	4
11	2
12	5
13	6
14	3
15	7
16	8
17	1
18	5
19	9
20	4
21	5
22	10
23	6
24	7
25	11
26	12
27	2
28	13
29	14
30	8
31	3
32	15
33	9
34	10
35	11
36	16
37	1
38	6
39	12
40	4
41	13
42	17
43	18
44	5
45	19
46	20
47	6
48	14
49	15
50	16
51	2
52	21
53	17
54	22
55	18
56	7
57	23
58	24
59	3
60	25
61	19
62	26
63	20
64	8
65	9
66	21
67	22
68	23
69	27
70	10
71	24
72	4
73	25
74	26
75	27
76	11
77	28
78	12
79	13
80	29
81	30
82	14
83	28

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	2
7	3
8	4
9	1
10	4
11	2
12	5
13	6
14	3
15	7
16	8
17	1
18	5
19	9
20	4
21	5
22	10
23	6
24	7
25	11
26	12
27	2
28	13
29	14
30	8
31	3
32	15
33	9
34	10
35	11
36	16
37	1
38	6
39	12
40	4
41	13
42	17
43	18
44	5
45	19
46	20
47	6
48	14
49	15
50	16
51	2
52	21
53	17
54	22
55	18
56	7
57	23
58	24
59	3
60	25
61	19
62	26
63	20
64	8
65	9
66	21
67	22
68	23
69	27
70	10
71	24
72	4
73	25
74	26
75	27
76	11
77	28
78	12
79	13
80	29
81	30
82	14
83	28