A051478 - cp's OEIS frontend

A051478 a(n) is the number of values k satisfying phi(k) = 4*n+2, n>0.

n	a(n)
1	4
2	2
3	0
4	4
5	2
6	0
7	2
8	0
9	0
10	4
11	2
12	0
13	2
14	2
15	0
16	2
17	2
18	0
19	2
20	2
21	0
22	0
23	0
24	0
25	2
26	2
27	2
28	0
29	0
30	0
31	2
32	2
33	0
34	2
35	0
36	0
37	2
38	0
39	0
40	4
41	2
42	0
43	0
44	2
45	0
46	0
47	2
48	0
49	2
50	0
51	0
52	2
53	0
54	0
55	2
56	2
57	0
58	0
59	2
60	0
61	0
62	2
63	0
64	0
65	2
66	0
67	2
68	0
69	0
70	2
71	0
72	0
73	2
74	0
75	0
76	2
77	2
78	0
79	0
80	0
81	0
82	2
83	0
84	0
85	2
86	2
87	0
88	0
89	2
90	0
91	2
92	0
93	0
94	2
95	2
96	0
97	0
98	0
99	0
100	0
101	0
102	0
103	0

[4, 2, 0, 4, 2, 0, 2, 0, 0, 4, 2, 0, 2, 2, 0, 2, 2, 0, 2, 2, 0, 0, 0, 0, 2, 2, 2, 0, 0, 0, 2, 2, 0, 2, 0, 0, 2, 0, 0, 4, 2, 0, 0, 2, 0, 0, 2, 0, 2, 0, 0, 2, 0, 0, 2, 2, 0, 0, 2, 0, 0, 2, 0, 0, 2, 0, 2, 0, 0, 2, 0, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 0, 2, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0]

cp's OEIS Frontend

A051478 a(n) is the number of values k satisfying phi(k) = 4*n+2, n>0.

Table of values

List of values

n	a(n)
1	4
2	2
3	0
4	4
5	2
6	0
7	2
8	0
9	0
10	4
11	2
12	0
13	2
14	2
15	0
16	2
17	2
18	0
19	2
20	2
21	0
22	0
23	0
24	0
25	2
26	2
27	2
28	0
29	0
30	0
31	2
32	2
33	0
34	2
35	0
36	0
37	2
38	0
39	0
40	4
41	2
42	0
43	0
44	2
45	0
46	0
47	2
48	0
49	2
50	0
51	0
52	2
53	0
54	0
55	2
56	2
57	0
58	0
59	2
60	0
61	0
62	2
63	0
64	0
65	2
66	0
67	2
68	0
69	0
70	2
71	0
72	0
73	2
74	0
75	0
76	2
77	2
78	0
79	0
80	0
81	0
82	2
83	0
84	0
85	2
86	2
87	0
88	0
89	2
90	0
91	2
92	0
93	0
94	2
95	2
96	0
97	0
98	0
99	0
100	0
101	0
102	0
103	0

n	a(n)
1	4
2	2
3	0
4	4
5	2
6	0
7	2
8	0
9	0
10	4
11	2
12	0
13	2
14	2
15	0
16	2
17	2
18	0
19	2
20	2
21	0
22	0
23	0
24	0
25	2
26	2
27	2
28	0
29	0
30	0
31	2
32	2
33	0
34	2
35	0
36	0
37	2
38	0
39	0
40	4
41	2
42	0
43	0
44	2
45	0
46	0
47	2
48	0
49	2
50	0
51	0
52	2
53	0
54	0
55	2
56	2
57	0
58	0
59	2
60	0
61	0
62	2
63	0
64	0
65	2
66	0
67	2
68	0
69	0
70	2
71	0
72	0
73	2
74	0
75	0
76	2
77	2
78	0
79	0
80	0
81	0
82	2
83	0
84	0
85	2
86	2
87	0
88	0
89	2
90	0
91	2
92	0
93	0
94	2
95	2
96	0
97	0
98	0
99	0
100	0
101	0
102	0
103	0

n	a(n)
1	4
2	2
3	0
4	4
5	2
6	0
7	2
8	0
9	0
10	4
11	2
12	0
13	2
14	2
15	0
16	2
17	2
18	0
19	2
20	2
21	0
22	0
23	0
24	0
25	2
26	2
27	2
28	0
29	0
30	0
31	2
32	2
33	0
34	2
35	0
36	0
37	2
38	0
39	0
40	4
41	2
42	0
43	0
44	2
45	0
46	0
47	2
48	0
49	2
50	0
51	0
52	2
53	0
54	0
55	2
56	2
57	0
58	0
59	2
60	0
61	0
62	2
63	0
64	0
65	2
66	0
67	2
68	0
69	0
70	2
71	0
72	0
73	2
74	0
75	0
76	2
77	2
78	0
79	0
80	0
81	0
82	2
83	0
84	0
85	2
86	2
87	0
88	0
89	2
90	0
91	2
92	0
93	0
94	2
95	2
96	0
97	0
98	0
99	0
100	0
101	0
102	0
103	0