A046920 - cp's OEIS frontend

A046920 Number of ways to express n as p+2a^2; p = 1 or prime, a >= 0.

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

[1, 1, 2, 1, 2, 0, 2, 0, 2, 1, 2, 0, 3, 0, 2, 0, 1, 0, 4, 1, 3, 0, 2, 0, 3, 0, 1, 0, 2, 0, 4, 0, 2, 1, 2, 0, 4, 0, 3, 0, 2, 0, 3, 0, 3, 0, 2, 0, 4, 0, 3, 1, 2, 0, 5, 0, 1, 0, 2, 0, 6, 0, 3, 0, 1, 0, 3, 0, 4, 0, 2, 0, 5, 1, 4, 0, 2, 0, 6, 0, 3, 0, 2, 0, 4, 0, 2, 0, 3, 0, 6, 0, 2, 0, 1, 0, 4, 0, 3]

cp's OEIS Frontend

A046920 Number of ways to express n as p+2a^2; p = 1 or prime, a >= 0.

Table of values

List of values

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

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

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