A337544 - cp's OEIS frontend

A337544 a(n) = 2*phi(A003961(n)) - A003961(n).

n	a(n)
1	1
2	1
3	3
4	3
5	5
6	1
7	9
8	9
9	15
10	3
11	11
12	3
13	15
14	7
15	13
16	27
17	17
18	5
19	21
20	9
21	25
22	9
23	27
24	9
25	35
26	13
27	75
28	21
29	29
30	-9
31	35
32	81
33	31
34	15
35	43
36	15
37	39
38	19
39	43
40	27
41	41
42	-5
43	45
44	27
45	65
46	25
47	51
48	27
49	99
50	21
51	49
52	39
53	57
54	25
55	53
56	63
57	61
58	27
59	59
60	-27
61	65
62	33
63	125
64	243
65	73
66	-3
67	69
68	45
69	79
70	9
71	71
72	45
73	77
74	37
75	91
76	57
77	97
78	1
79	81
80	81
81	375
82	39
83	87
84	-15
85	83

[1, 1, 3, 3, 5, 1, 9, 9, 15, 3, 11, 3, 15, 7, 13, 27, 17, 5, 21, 9, 25, 9, 27, 9, 35, 13, 75, 21, 29, -9, 35, 81, 31, 15, 43, 15, 39, 19, 43, 27, 41, -5, 45, 27, 65, 25, 51, 27, 99, 21, 49, 39, 57, 25, 53, 63, 61, 27, 59, -27, 65, 33, 125, 243, 73, -3, 69, 45, 79, 9, 71, 45, 77, 37, 91, 57, 97, 1, 81, 81, 375, 39, 87, -15, 83]

cp's OEIS Frontend

A337544 a(n) = 2*phi(A003961(n)) - A003961(n).

Table of values

List of values

n	a(n)
1	1
2	1
3	3
4	3
5	5
6	1
7	9
8	9
9	15
10	3
11	11
12	3
13	15
14	7
15	13
16	27
17	17
18	5
19	21
20	9
21	25
22	9
23	27
24	9
25	35
26	13
27	75
28	21
29	29
30	-9
31	35
32	81
33	31
34	15
35	43
36	15
37	39
38	19
39	43
40	27
41	41
42	-5
43	45
44	27
45	65
46	25
47	51
48	27
49	99
50	21
51	49
52	39
53	57
54	25
55	53
56	63
57	61
58	27
59	59
60	-27
61	65
62	33
63	125
64	243
65	73
66	-3
67	69
68	45
69	79
70	9
71	71
72	45
73	77
74	37
75	91
76	57
77	97
78	1
79	81
80	81
81	375
82	39
83	87
84	-15
85	83

n	a(n)
1	1
2	1
3	3
4	3
5	5
6	1
7	9
8	9
9	15
10	3
11	11
12	3
13	15
14	7
15	13
16	27
17	17
18	5
19	21
20	9
21	25
22	9
23	27
24	9
25	35
26	13
27	75
28	21
29	29
30	-9
31	35
32	81
33	31
34	15
35	43
36	15
37	39
38	19
39	43
40	27
41	41
42	-5
43	45
44	27
45	65
46	25
47	51
48	27
49	99
50	21
51	49
52	39
53	57
54	25
55	53
56	63
57	61
58	27
59	59
60	-27
61	65
62	33
63	125
64	243
65	73
66	-3
67	69
68	45
69	79
70	9
71	71
72	45
73	77
74	37
75	91
76	57
77	97
78	1
79	81
80	81
81	375
82	39
83	87
84	-15
85	83

n	a(n)
1	1
2	1
3	3
4	3
5	5
6	1
7	9
8	9
9	15
10	3
11	11
12	3
13	15
14	7
15	13
16	27
17	17
18	5
19	21
20	9
21	25
22	9
23	27
24	9
25	35
26	13
27	75
28	21
29	29
30	-9
31	35
32	81
33	31
34	15
35	43
36	15
37	39
38	19
39	43
40	27
41	41
42	-5
43	45
44	27
45	65
46	25
47	51
48	27
49	99
50	21
51	49
52	39
53	57
54	25
55	53
56	63
57	61
58	27
59	59
60	-27
61	65
62	33
63	125
64	243
65	73
66	-3
67	69
68	45
69	79
70	9
71	71
72	45
73	77
74	37
75	91
76	57
77	97
78	1
79	81
80	81
81	375
82	39
83	87
84	-15
85	83