A325423 - cp's OEIS frontend

A325423 Numbers k such that sigma(2k+1) >= sigma(2k).

n	a(n)
1	1
2	7
3	31
4	37
5	67
6	73
7	97
8	103
9	127
10	157
11	199
12	202
13	229
14	241
15	247
16	262
17	277
18	283
19	307
20	313
21	331
22	337
23	346
24	367
25	379
26	382
27	397
28	409
29	427
30	457
31	472
32	487
33	499
34	517
35	547
36	562
37	577
38	607
39	619
40	643
41	661
42	667
43	682
44	697
45	727
46	757
47	769
48	787

[1, 7, 31, 37, 67, 73, 97, 103, 127, 157, 199, 202, 229, 241, 247, 262, 277, 283, 307, 313, 331, 337, 346, 367, 379, 382, 397, 409, 427, 457, 472, 487, 499, 517, 547, 562, 577, 607, 619, 643, 661, 667, 682, 697, 727, 757, 769, 787]

cp's OEIS Frontend

A325423 Numbers k such that sigma(2k+1) >= sigma(2k).

Table of values

List of values

n	a(n)
1	1
2	7
3	31
4	37
5	67
6	73
7	97
8	103
9	127
10	157
11	199
12	202
13	229
14	241
15	247
16	262
17	277
18	283
19	307
20	313
21	331
22	337
23	346
24	367
25	379
26	382
27	397
28	409
29	427
30	457
31	472
32	487
33	499
34	517
35	547
36	562
37	577
38	607
39	619
40	643
41	661
42	667
43	682
44	697
45	727
46	757
47	769
48	787

n	a(n)
1	1
2	7
3	31
4	37
5	67
6	73
7	97
8	103
9	127
10	157
11	199
12	202
13	229
14	241
15	247
16	262
17	277
18	283
19	307
20	313
21	331
22	337
23	346
24	367
25	379
26	382
27	397
28	409
29	427
30	457
31	472
32	487
33	499
34	517
35	547
36	562
37	577
38	607
39	619
40	643
41	661
42	667
43	682
44	697
45	727
46	757
47	769
48	787

cp's OEIS Frontend

A325423 Numbers k such that sigma(2*k+1) >= sigma(2*k).

Table of values

List of values

A325423 Numbers k such that sigma(2k+1) >= sigma(2k).

n	a(n)
1	1
2	7
3	31
4	37
5	67
6	73
7	97
8	103
9	127
10	157
11	199
12	202
13	229
14	241
15	247
16	262
17	277
18	283
19	307
20	313
21	331
22	337
23	346
24	367
25	379
26	382
27	397
28	409
29	427
30	457
31	472
32	487
33	499
34	517
35	547
36	562
37	577
38	607
39	619
40	643
41	661
42	667
43	682
44	697
45	727
46	757
47	769
48	787