A111426 - cp's OEIS frontend

A111426 Difference between largest and smallest prime factor of the n-th composite number.

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

[0, 1, 0, 0, 3, 1, 5, 2, 0, 1, 3, 4, 9, 1, 0, 11, 0, 5, 3, 0, 8, 15, 2, 1, 17, 10, 3, 5, 9, 2, 21, 1, 0, 3, 14, 11, 1, 6, 5, 16, 27, 3, 29, 4, 0, 8, 9, 15, 20, 5, 1, 35, 2, 17, 4, 11, 3, 0, 39, 5, 12, 41, 26, 9, 3, 6, 21, 28, 45, 14, 1, 5, 8, 3, 15, 11, 4, 51, 1, 9, 34, 5, 17, 18, 27, 10, 57, 10, 3, 0]

cp's OEIS Frontend

A111426 Difference between largest and smallest prime factor of the n-th composite number.

Table of values

List of values

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

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

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