A376109 - cp's OEIS frontend

A376109 a(n) is the length of the longest arithmetic progression ending at n consisting of numbers with the same number of prime factors as n, counted with multiplicity.

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	2
7	3
8	1
9	2
10	2
11	3
12	2
13	2
14	3
15	2
16	1
17	3
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	2
26	3
27	2
28	3
29	5
30	2
31	3
32	1
33	3
34	3
35	3
36	2
37	2
38	3
39	2
40	2
41	4
42	3
43	4
44	3
45	2
46	4
47	3
48	2
49	3
50	2
51	3
52	3
53	5
54	2
55	4
56	3
57	3
58	5
59	4
60	2
61	3
62	3
63	3
64	1
65	3
66	3
67	3
68	3
69	4
70	3
71	3
72	2
73	3
74	3
75	2
76	3
77	3
78	3
79	4
80	2
81	2
82	4
83	4
84	3
85	3
86	4
87	5
88	3
89	3
90	2
91	4
92	4
93	4
94	3
95	3
96	2
97	4
98	3
99	3

[1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 2, 3, 2, 1, 3, 2, 3, 2, 3, 3, 4, 2, 2, 3, 2, 3, 5, 2, 3, 1, 3, 3, 3, 2, 2, 3, 2, 2, 4, 3, 4, 3, 2, 4, 3, 2, 3, 2, 3, 3, 5, 2, 4, 3, 3, 5, 4, 2, 3, 3, 3, 1, 3, 3, 3, 3, 4, 3, 3, 2, 3, 3, 2, 3, 3, 3, 4, 2, 2, 4, 4, 3, 3, 4, 5, 3, 3, 2, 4, 4, 4, 3, 3, 2, 4, 3, 3]

cp's OEIS Frontend

A376109 a(n) is the length of the longest arithmetic progression ending at n consisting of numbers with the same number of prime factors as n, counted with multiplicity.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	2
7	3
8	1
9	2
10	2
11	3
12	2
13	2
14	3
15	2
16	1
17	3
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	2
26	3
27	2
28	3
29	5
30	2
31	3
32	1
33	3
34	3
35	3
36	2
37	2
38	3
39	2
40	2
41	4
42	3
43	4
44	3
45	2
46	4
47	3
48	2
49	3
50	2
51	3
52	3
53	5
54	2
55	4
56	3
57	3
58	5
59	4
60	2
61	3
62	3
63	3
64	1
65	3
66	3
67	3
68	3
69	4
70	3
71	3
72	2
73	3
74	3
75	2
76	3
77	3
78	3
79	4
80	2
81	2
82	4
83	4
84	3
85	3
86	4
87	5
88	3
89	3
90	2
91	4
92	4
93	4
94	3
95	3
96	2
97	4
98	3
99	3

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	2
7	3
8	1
9	2
10	2
11	3
12	2
13	2
14	3
15	2
16	1
17	3
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	2
26	3
27	2
28	3
29	5
30	2
31	3
32	1
33	3
34	3
35	3
36	2
37	2
38	3
39	2
40	2
41	4
42	3
43	4
44	3
45	2
46	4
47	3
48	2
49	3
50	2
51	3
52	3
53	5
54	2
55	4
56	3
57	3
58	5
59	4
60	2
61	3
62	3
63	3
64	1
65	3
66	3
67	3
68	3
69	4
70	3
71	3
72	2
73	3
74	3
75	2
76	3
77	3
78	3
79	4
80	2
81	2
82	4
83	4
84	3
85	3
86	4
87	5
88	3
89	3
90	2
91	4
92	4
93	4
94	3
95	3
96	2
97	4
98	3
99	3

n	a(n)
1	1
2	1
3	2
4	1
5	2
6	2
7	3
8	1
9	2
10	2
11	3
12	2
13	2
14	3
15	2
16	1
17	3
18	2
19	3
20	2
21	3
22	3
23	4
24	2
25	2
26	3
27	2
28	3
29	5
30	2
31	3
32	1
33	3
34	3
35	3
36	2
37	2
38	3
39	2
40	2
41	4
42	3
43	4
44	3
45	2
46	4
47	3
48	2
49	3
50	2
51	3
52	3
53	5
54	2
55	4
56	3
57	3
58	5
59	4
60	2
61	3
62	3
63	3
64	1
65	3
66	3
67	3
68	3
69	4
70	3
71	3
72	2
73	3
74	3
75	2
76	3
77	3
78	3
79	4
80	2
81	2
82	4
83	4
84	3
85	3
86	4
87	5
88	3
89	3
90	2
91	4
92	4
93	4
94	3
95	3
96	2
97	4
98	3
99	3