A297167 - cp's OEIS frontend

A297167 a(1) = 0, for n > 1, a(n) = -1 + the excess of n (A046660) + the index of the largest prime factor (A061395).

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	3
8	2
9	2
10	2
11	4
12	2
13	5
14	3
15	2
16	3
17	6
18	2
19	7
20	3
21	3
22	4
23	8
24	3
25	3
26	5
27	3
28	4
29	9
30	2
31	10
32	4
33	4
34	6
35	3
36	3
37	11
38	7
39	5
40	4
41	12
42	3
43	13
44	5
45	3
46	8
47	14
48	4
49	4
50	3
51	6
52	6
53	15
54	3
55	4
56	5
57	7
58	9
59	16
60	3
61	17
62	10
63	4
64	5
65	5
66	4
67	18
68	7
69	8
70	3
71	19
72	4
73	20
74	11
75	3
76	8
77	4
78	5
79	21
80	5
81	4
82	12
83	22
84	4
85	6
86	13
87	9
88	6
89	23
90	3
91	5
92	9
93	10
94	14
95	7
96	5
97	24
98	4
99	5
100	4
101	25
102	6
103	26
104	7
105	3

[0, 0, 1, 1, 2, 1, 3, 2, 2, 2, 4, 2, 5, 3, 2, 3, 6, 2, 7, 3, 3, 4, 8, 3, 3, 5, 3, 4, 9, 2, 10, 4, 4, 6, 3, 3, 11, 7, 5, 4, 12, 3, 13, 5, 3, 8, 14, 4, 4, 3, 6, 6, 15, 3, 4, 5, 7, 9, 16, 3, 17, 10, 4, 5, 5, 4, 18, 7, 8, 3, 19, 4, 20, 11, 3, 8, 4, 5, 21, 5, 4, 12, 22, 4, 6, 13, 9, 6, 23, 3, 5, 9, 10, 14, 7, 5, 24, 4, 5, 4, 25, 6, 26, 7, 3]

cp's OEIS Frontend

A297167 a(1) = 0, for n > 1, a(n) = -1 + the excess of n (A046660) + the index of the largest prime factor (A061395).

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	3
8	2
9	2
10	2
11	4
12	2
13	5
14	3
15	2
16	3
17	6
18	2
19	7
20	3
21	3
22	4
23	8
24	3
25	3
26	5
27	3
28	4
29	9
30	2
31	10
32	4
33	4
34	6
35	3
36	3
37	11
38	7
39	5
40	4
41	12
42	3
43	13
44	5
45	3
46	8
47	14
48	4
49	4
50	3
51	6
52	6
53	15
54	3
55	4
56	5
57	7
58	9
59	16
60	3
61	17
62	10
63	4
64	5
65	5
66	4
67	18
68	7
69	8
70	3
71	19
72	4
73	20
74	11
75	3
76	8
77	4
78	5
79	21
80	5
81	4
82	12
83	22
84	4
85	6
86	13
87	9
88	6
89	23
90	3
91	5
92	9
93	10
94	14
95	7
96	5
97	24
98	4
99	5
100	4
101	25
102	6
103	26
104	7
105	3

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	3
8	2
9	2
10	2
11	4
12	2
13	5
14	3
15	2
16	3
17	6
18	2
19	7
20	3
21	3
22	4
23	8
24	3
25	3
26	5
27	3
28	4
29	9
30	2
31	10
32	4
33	4
34	6
35	3
36	3
37	11
38	7
39	5
40	4
41	12
42	3
43	13
44	5
45	3
46	8
47	14
48	4
49	4
50	3
51	6
52	6
53	15
54	3
55	4
56	5
57	7
58	9
59	16
60	3
61	17
62	10
63	4
64	5
65	5
66	4
67	18
68	7
69	8
70	3
71	19
72	4
73	20
74	11
75	3
76	8
77	4
78	5
79	21
80	5
81	4
82	12
83	22
84	4
85	6
86	13
87	9
88	6
89	23
90	3
91	5
92	9
93	10
94	14
95	7
96	5
97	24
98	4
99	5
100	4
101	25
102	6
103	26
104	7
105	3

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	3
8	2
9	2
10	2
11	4
12	2
13	5
14	3
15	2
16	3
17	6
18	2
19	7
20	3
21	3
22	4
23	8
24	3
25	3
26	5
27	3
28	4
29	9
30	2
31	10
32	4
33	4
34	6
35	3
36	3
37	11
38	7
39	5
40	4
41	12
42	3
43	13
44	5
45	3
46	8
47	14
48	4
49	4
50	3
51	6
52	6
53	15
54	3
55	4
56	5
57	7
58	9
59	16
60	3
61	17
62	10
63	4
64	5
65	5
66	4
67	18
68	7
69	8
70	3
71	19
72	4
73	20
74	11
75	3
76	8
77	4
78	5
79	21
80	5
81	4
82	12
83	22
84	4
85	6
86	13
87	9
88	6
89	23
90	3
91	5
92	9
93	10
94	14
95	7
96	5
97	24
98	4
99	5
100	4
101	25
102	6
103	26
104	7
105	3