A083218 - cp's OEIS frontend

A083218 a(n) = n mod (spf(n+1)+1), where spf(n) is the smallest prime factor of n (A020639).

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

[1, 2, 0, 4, 2, 6, 1, 0, 0, 10, 2, 12, 1, 2, 0, 16, 2, 18, 1, 0, 0, 22, 2, 0, 1, 2, 0, 28, 2, 30, 1, 0, 0, 4, 2, 36, 1, 2, 0, 40, 2, 42, 1, 0, 0, 46, 2, 0, 1, 2, 0, 52, 2, 0, 1, 0, 0, 58, 2, 60, 1, 2, 0, 4, 2, 66, 1, 0, 0, 70, 2, 72, 1, 2, 0, 4, 2, 78, 1, 0, 0, 82, 2, 0, 1, 2, 0, 88, 2, 2, 1, 0, 0, 4, 2, 96]

cp's OEIS Frontend

A083218 a(n) = n mod (spf(n+1)+1), where spf(n) is the smallest prime factor of n (A020639).

Table of values

List of values

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

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

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