A305977 - cp's OEIS frontend

A305977 Filter sequence combining prime signatures of n and 2n-1.

n	a(n)
1	1
2	2
3	2
4	3
5	4
6	5
7	2
8	6
9	3
10	5
11	7
12	8
13	4
14	9
15	5
16	10
17	7
18	11
19	2
20	11
21	5
22	5
23	12
24	13
25	14
26	15
27	16
28	11
29	7
30	17
31	2
32	18
33	15
34	5
35	15
36	19
37	2
38	20
39	15
40	13
41	21
42	17
43	7
44	11
45	8
46	15
47	7
48	22
49	3
50	23
51	5
52	8
53	24
54	13
55	5
56	25
57	5
58	15
59	12
60	26
61	4
62	15
63	27
64	28
65	15
66	17
67	7
68	29
69	5
70	17
71	7
72	30
73	7
74	20
75	8
76	8
77	20
78	31
79	2
80	22
81	32
82	5
83	24
84	33
85	34
86	20
87	5
88	35
89	7
90	33
91	5
92	11
93	15
94	15
95	36
96	37
97	2
98	38
99	8
100	19
101	7
102	31

[1, 2, 2, 3, 4, 5, 2, 6, 3, 5, 7, 8, 4, 9, 5, 10, 7, 11, 2, 11, 5, 5, 12, 13, 14, 15, 16, 11, 7, 17, 2, 18, 15, 5, 15, 19, 2, 20, 15, 13, 21, 17, 7, 11, 8, 15, 7, 22, 3, 23, 5, 8, 24, 13, 5, 25, 5, 15, 12, 26, 4, 15, 27, 28, 15, 17, 7, 29, 5, 17, 7, 30, 7, 20, 8, 8, 20, 31, 2, 22, 32, 5, 24, 33, 34, 20, 5, 35, 7, 33, 5, 11, 15, 15, 36, 37, 2, 38, 8, 19, 7, 31]

cp's OEIS Frontend

A305977 Filter sequence combining prime signatures of n and 2n-1.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	3
5	4
6	5
7	2
8	6
9	3
10	5
11	7
12	8
13	4
14	9
15	5
16	10
17	7
18	11
19	2
20	11
21	5
22	5
23	12
24	13
25	14
26	15
27	16
28	11
29	7
30	17
31	2
32	18
33	15
34	5
35	15
36	19
37	2
38	20
39	15
40	13
41	21
42	17
43	7
44	11
45	8
46	15
47	7
48	22
49	3
50	23
51	5
52	8
53	24
54	13
55	5
56	25
57	5
58	15
59	12
60	26
61	4
62	15
63	27
64	28
65	15
66	17
67	7
68	29
69	5
70	17
71	7
72	30
73	7
74	20
75	8
76	8
77	20
78	31
79	2
80	22
81	32
82	5
83	24
84	33
85	34
86	20
87	5
88	35
89	7
90	33
91	5
92	11
93	15
94	15
95	36
96	37
97	2
98	38
99	8
100	19
101	7
102	31

n	a(n)
1	1
2	2
3	2
4	3
5	4
6	5
7	2
8	6
9	3
10	5
11	7
12	8
13	4
14	9
15	5
16	10
17	7
18	11
19	2
20	11
21	5
22	5
23	12
24	13
25	14
26	15
27	16
28	11
29	7
30	17
31	2
32	18
33	15
34	5
35	15
36	19
37	2
38	20
39	15
40	13
41	21
42	17
43	7
44	11
45	8
46	15
47	7
48	22
49	3
50	23
51	5
52	8
53	24
54	13
55	5
56	25
57	5
58	15
59	12
60	26
61	4
62	15
63	27
64	28
65	15
66	17
67	7
68	29
69	5
70	17
71	7
72	30
73	7
74	20
75	8
76	8
77	20
78	31
79	2
80	22
81	32
82	5
83	24
84	33
85	34
86	20
87	5
88	35
89	7
90	33
91	5
92	11
93	15
94	15
95	36
96	37
97	2
98	38
99	8
100	19
101	7
102	31

n	a(n)
1	1
2	2
3	2
4	3
5	4
6	5
7	2
8	6
9	3
10	5
11	7
12	8
13	4
14	9
15	5
16	10
17	7
18	11
19	2
20	11
21	5
22	5
23	12
24	13
25	14
26	15
27	16
28	11
29	7
30	17
31	2
32	18
33	15
34	5
35	15
36	19
37	2
38	20
39	15
40	13
41	21
42	17
43	7
44	11
45	8
46	15
47	7
48	22
49	3
50	23
51	5
52	8
53	24
54	13
55	5
56	25
57	5
58	15
59	12
60	26
61	4
62	15
63	27
64	28
65	15
66	17
67	7
68	29
69	5
70	17
71	7
72	30
73	7
74	20
75	8
76	8
77	20
78	31
79	2
80	22
81	32
82	5
83	24
84	33
85	34
86	20
87	5
88	35
89	7
90	33
91	5
92	11
93	15
94	15
95	36
96	37
97	2
98	38
99	8
100	19
101	7
102	31