A206770 - cp's OEIS frontend

A206770 Smallest number k such that sigma(k-2n)=sigma(k)-2n.

n	a(n)
1	5
2	7
3	11
4	11
5	13
6	17
7	17
8	19
9	23
10	23
11	29
12	29
13	21
14	31
15	37
16	37
17	37
18	41
19	28
20	33
21	47
22	47
23	53
24	53
25	53
26	59
27	59
28	44
29	61
30	67
31	67
32	67
33	71
34	57
35	73
36	79
37	79
38	79
39	83
40	83
41	69
42	89
43	74
44	101
45	68
46	97
47	97
48	85
49	101
50	103
51	107
52	107
53	109
54	113
55	93
56	131
57	127
58	127
59	131
60	127
61	127
62	127

[5, 7, 11, 11, 13, 17, 17, 19, 23, 23, 29, 29, 21, 31, 37, 37, 37, 41, 28, 33, 47, 47, 53, 53, 53, 59, 59, 44, 61, 67, 67, 67, 71, 57, 73, 79, 79, 79, 83, 83, 69, 89, 74, 101, 68, 97, 97, 85, 101, 103, 107, 107, 109, 113, 93, 131, 127, 127, 131, 127, 127, 127]

cp's OEIS Frontend

A206770 Smallest number k such that sigma(k-2n)=sigma(k)-2n.

Table of values

List of values

n	a(n)
1	5
2	7
3	11
4	11
5	13
6	17
7	17
8	19
9	23
10	23
11	29
12	29
13	21
14	31
15	37
16	37
17	37
18	41
19	28
20	33
21	47
22	47
23	53
24	53
25	53
26	59
27	59
28	44
29	61
30	67
31	67
32	67
33	71
34	57
35	73
36	79
37	79
38	79
39	83
40	83
41	69
42	89
43	74
44	101
45	68
46	97
47	97
48	85
49	101
50	103
51	107
52	107
53	109
54	113
55	93
56	131
57	127
58	127
59	131
60	127
61	127
62	127

n	a(n)
1	5
2	7
3	11
4	11
5	13
6	17
7	17
8	19
9	23
10	23
11	29
12	29
13	21
14	31
15	37
16	37
17	37
18	41
19	28
20	33
21	47
22	47
23	53
24	53
25	53
26	59
27	59
28	44
29	61
30	67
31	67
32	67
33	71
34	57
35	73
36	79
37	79
38	79
39	83
40	83
41	69
42	89
43	74
44	101
45	68
46	97
47	97
48	85
49	101
50	103
51	107
52	107
53	109
54	113
55	93
56	131
57	127
58	127
59	131
60	127
61	127
62	127

cp's OEIS Frontend

A206770 Smallest number k such that sigma(k-2*n)=sigma(k)-2*n.

Table of values

List of values

A206770 Smallest number k such that sigma(k-2n)=sigma(k)-2n.

n	a(n)
1	5
2	7
3	11
4	11
5	13
6	17
7	17
8	19
9	23
10	23
11	29
12	29
13	21
14	31
15	37
16	37
17	37
18	41
19	28
20	33
21	47
22	47
23	53
24	53
25	53
26	59
27	59
28	44
29	61
30	67
31	67
32	67
33	71
34	57
35	73
36	79
37	79
38	79
39	83
40	83
41	69
42	89
43	74
44	101
45	68
46	97
47	97
48	85
49	101
50	103
51	107
52	107
53	109
54	113
55	93
56	131
57	127
58	127
59	131
60	127
61	127
62	127