A070802 - cp's OEIS frontend

A070802 a(n)=prevprime[sigma(n)]-nextprime[phi(n)]=A070801(n)-A070800(n).

n	a(n)
2	1
3	0
4	4
5	0
6	8
7	0
8	8
9	6
10	12
11	0
12	18
13	0
14	16
15	12
16	20
17	0
18	30
19	0
20	30
21	18
22	20
23	0
24	48
25	8
26	28
27	18
28	40
29	0
30	60
31	0
32	44
33	24
34	36
35	18
36	76
37	0
38	40
39	24
40	72
41	0
42	76
43	0
44	60
45	44
46	48
47	0
48	96
49	10
50	66
51	34
52	68
53	0
54	94
55	30
56	84
57	42
58	60
59	0
60	150
61	0
62	58
63	66
64	90
65	30
66	116
67	0
68	76
69	42
70	110
71	0
72	164
73	0
74	76
75	72
76	102
77	28

[1, 0, 4, 0, 8, 0, 8, 6, 12, 0, 18, 0, 16, 12, 20, 0, 30, 0, 30, 18, 20, 0, 48, 8, 28, 18, 40, 0, 60, 0, 44, 24, 36, 18, 76, 0, 40, 24, 72, 0, 76, 0, 60, 44, 48, 0, 96, 10, 66, 34, 68, 0, 94, 30, 84, 42, 60, 0, 150, 0, 58, 66, 90, 30, 116, 0, 76, 42, 110, 0, 164, 0, 76, 72, 102, 28]

cp's OEIS Frontend

A070802 a(n)=prevprime[sigma(n)]-nextprime[phi(n)]=A070801(n)-A070800(n).

Table of values

List of values

n	a(n)
2	1
3	0
4	4
5	0
6	8
7	0
8	8
9	6
10	12
11	0
12	18
13	0
14	16
15	12
16	20
17	0
18	30
19	0
20	30
21	18
22	20
23	0
24	48
25	8
26	28
27	18
28	40
29	0
30	60
31	0
32	44
33	24
34	36
35	18
36	76
37	0
38	40
39	24
40	72
41	0
42	76
43	0
44	60
45	44
46	48
47	0
48	96
49	10
50	66
51	34
52	68
53	0
54	94
55	30
56	84
57	42
58	60
59	0
60	150
61	0
62	58
63	66
64	90
65	30
66	116
67	0
68	76
69	42
70	110
71	0
72	164
73	0
74	76
75	72
76	102
77	28

n	a(n)
2	1
3	0
4	4
5	0
6	8
7	0
8	8
9	6
10	12
11	0
12	18
13	0
14	16
15	12
16	20
17	0
18	30
19	0
20	30
21	18
22	20
23	0
24	48
25	8
26	28
27	18
28	40
29	0
30	60
31	0
32	44
33	24
34	36
35	18
36	76
37	0
38	40
39	24
40	72
41	0
42	76
43	0
44	60
45	44
46	48
47	0
48	96
49	10
50	66
51	34
52	68
53	0
54	94
55	30
56	84
57	42
58	60
59	0
60	150
61	0
62	58
63	66
64	90
65	30
66	116
67	0
68	76
69	42
70	110
71	0
72	164
73	0
74	76
75	72
76	102
77	28

n	a(n)
2	1
3	0
4	4
5	0
6	8
7	0
8	8
9	6
10	12
11	0
12	18
13	0
14	16
15	12
16	20
17	0
18	30
19	0
20	30
21	18
22	20
23	0
24	48
25	8
26	28
27	18
28	40
29	0
30	60
31	0
32	44
33	24
34	36
35	18
36	76
37	0
38	40
39	24
40	72
41	0
42	76
43	0
44	60
45	44
46	48
47	0
48	96
49	10
50	66
51	34
52	68
53	0
54	94
55	30
56	84
57	42
58	60
59	0
60	150
61	0
62	58
63	66
64	90
65	30
66	116
67	0
68	76
69	42
70	110
71	0
72	164
73	0
74	76
75	72
76	102
77	28