A336851 - cp's OEIS frontend

A336851 a(n) = sigma(A003961(n)) - A003961(n), where A003961 is a prime shift towards larger primes, sigma is the sum of divisors.

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	9
7	1
8	13
9	6
10	11
11	1
12	33
13	1
14	15
15	13
16	40
17	1
18	49
19	1
20	41
21	17
22	17
23	1
24	105
25	8
26	21
27	31
28	57
29	1
30	87
31	1
32	121
33	19
34	23
35	19
36	178
37	1
38	27
39	23
40	131
41	1
42	123
43	1
44	65
45	73
46	33
47	1
48	321
49	12
50	81
51	25
52	81
53	1
54	249
55	21
56	183
57	29
58	35
59	1
60	309
61	1
62	41
63	97
64	364
65	25
66	141
67	1
68	89
69	35
70	153
71	1
72	565
73	1
74	45
75	97
76	105
77	25
78	177
79	1
80	401
81	156
82	47

[0, 1, 1, 4, 1, 9, 1, 13, 6, 11, 1, 33, 1, 15, 13, 40, 1, 49, 1, 41, 17, 17, 1, 105, 8, 21, 31, 57, 1, 87, 1, 121, 19, 23, 19, 178, 1, 27, 23, 131, 1, 123, 1, 65, 73, 33, 1, 321, 12, 81, 25, 81, 1, 249, 21, 183, 29, 35, 1, 309, 1, 41, 97, 364, 25, 141, 1, 89, 35, 153, 1, 565, 1, 45, 97, 105, 25, 177, 1, 401, 156, 47]

cp's OEIS Frontend

A336851 a(n) = sigma(A003961(n)) - A003961(n), where A003961 is a prime shift towards larger primes, sigma is the sum of divisors.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	9
7	1
8	13
9	6
10	11
11	1
12	33
13	1
14	15
15	13
16	40
17	1
18	49
19	1
20	41
21	17
22	17
23	1
24	105
25	8
26	21
27	31
28	57
29	1
30	87
31	1
32	121
33	19
34	23
35	19
36	178
37	1
38	27
39	23
40	131
41	1
42	123
43	1
44	65
45	73
46	33
47	1
48	321
49	12
50	81
51	25
52	81
53	1
54	249
55	21
56	183
57	29
58	35
59	1
60	309
61	1
62	41
63	97
64	364
65	25
66	141
67	1
68	89
69	35
70	153
71	1
72	565
73	1
74	45
75	97
76	105
77	25
78	177
79	1
80	401
81	156
82	47

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	9
7	1
8	13
9	6
10	11
11	1
12	33
13	1
14	15
15	13
16	40
17	1
18	49
19	1
20	41
21	17
22	17
23	1
24	105
25	8
26	21
27	31
28	57
29	1
30	87
31	1
32	121
33	19
34	23
35	19
36	178
37	1
38	27
39	23
40	131
41	1
42	123
43	1
44	65
45	73
46	33
47	1
48	321
49	12
50	81
51	25
52	81
53	1
54	249
55	21
56	183
57	29
58	35
59	1
60	309
61	1
62	41
63	97
64	364
65	25
66	141
67	1
68	89
69	35
70	153
71	1
72	565
73	1
74	45
75	97
76	105
77	25
78	177
79	1
80	401
81	156
82	47

n	a(n)
1	0
2	1
3	1
4	4
5	1
6	9
7	1
8	13
9	6
10	11
11	1
12	33
13	1
14	15
15	13
16	40
17	1
18	49
19	1
20	41
21	17
22	17
23	1
24	105
25	8
26	21
27	31
28	57
29	1
30	87
31	1
32	121
33	19
34	23
35	19
36	178
37	1
38	27
39	23
40	131
41	1
42	123
43	1
44	65
45	73
46	33
47	1
48	321
49	12
50	81
51	25
52	81
53	1
54	249
55	21
56	183
57	29
58	35
59	1
60	309
61	1
62	41
63	97
64	364
65	25
66	141
67	1
68	89
69	35
70	153
71	1
72	565
73	1
74	45
75	97
76	105
77	25
78	177
79	1
80	401
81	156
82	47