A255324 - cp's OEIS frontend

A255324 Difference between the n-th Ludic number and the n-th noncomposite number: a(n) = A003309(n) - A008578(n).

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

[0, 0, 0, 0, 0, 0, 0, 0, 4, 2, 0, 6, 4, 2, 4, 6, 8, 8, 10, 10, 12, 16, 12, 14, 18, 18, 18, 18, 20, 22, 30, 22, 26, 24, 34, 26, 28, 24, 30, 42, 38, 42, 42, 36, 40, 38, 40, 36, 34, 38, 48, 50, 48, 60, 56, 56, 66, 62, 66, 64, 72, 76, 68, 70, 72, 76, 80, 76, 78, 72, 72, 78, 74, 70, 72, 84, 84, 86, 84, 92, 88, 84, 88, 86, 94, 96, 98, 104]

cp's OEIS Frontend

A255324 Difference between the n-th Ludic number and the n-th noncomposite number: a(n) = A003309(n) - A008578(n).

Table of values

List of values

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

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

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