A255686 - cp's OEIS frontend

A255686 Numbers n such that lambda(sum of odd divisors of Fibonacci(n)) = lambda(sum of even divisors of Fibonacci(n)) where lambda is the Carmichael function (A002322).

n	a(n)
1	3
2	9
3	12
4	15
5	18
6	21
7	27
8	33
9	39
10	45
11	51
12	63
13	69
14	87
15	93
16	111
17	123
18	135
19	141
20	153
21	159
22	177
23	189
24	201
25	219
26	225
27	237
28	249
29	255
30	267
31	291
32	303
33	309
34	321
35	339
36	363
37	381
38	393
39	411
40	423
41	453
42	459
43	501
44	537
45	543
46	573
47	579
48	633
49	669
50	699

[3, 9, 12, 15, 18, 21, 27, 33, 39, 45, 51, 63, 69, 87, 93, 111, 123, 135, 141, 153, 159, 177, 189, 201, 219, 225, 237, 249, 255, 267, 291, 303, 309, 321, 339, 363, 381, 393, 411, 423, 453, 459, 501, 537, 543, 573, 579, 633, 669, 699]

cp's OEIS Frontend

A255686 Numbers n such that lambda(sum of odd divisors of Fibonacci(n)) = lambda(sum of even divisors of Fibonacci(n)) where lambda is the Carmichael function (A002322).

Table of values

List of values

n	a(n)
1	3
2	9
3	12
4	15
5	18
6	21
7	27
8	33
9	39
10	45
11	51
12	63
13	69
14	87
15	93
16	111
17	123
18	135
19	141
20	153
21	159
22	177
23	189
24	201
25	219
26	225
27	237
28	249
29	255
30	267
31	291
32	303
33	309
34	321
35	339
36	363
37	381
38	393
39	411
40	423
41	453
42	459
43	501
44	537
45	543
46	573
47	579
48	633
49	669
50	699

n	a(n)
1	3
2	9
3	12
4	15
5	18
6	21
7	27
8	33
9	39
10	45
11	51
12	63
13	69
14	87
15	93
16	111
17	123
18	135
19	141
20	153
21	159
22	177
23	189
24	201
25	219
26	225
27	237
28	249
29	255
30	267
31	291
32	303
33	309
34	321
35	339
36	363
37	381
38	393
39	411
40	423
41	453
42	459
43	501
44	537
45	543
46	573
47	579
48	633
49	669
50	699

n	a(n)
1	3
2	9
3	12
4	15
5	18
6	21
7	27
8	33
9	39
10	45
11	51
12	63
13	69
14	87
15	93
16	111
17	123
18	135
19	141
20	153
21	159
22	177
23	189
24	201
25	219
26	225
27	237
28	249
29	255
30	267
31	291
32	303
33	309
34	321
35	339
36	363
37	381
38	393
39	411
40	423
41	453
42	459
43	501
44	537
45	543
46	573
47	579
48	633
49	669
50	699