A338274 - cp's OEIS frontend

A338274 Number of decompositions of 2n >= 4 into an unordered sum of two primes, n - d and n + d, such that d < sqrt(2n - 1).

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

[1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 1, 0, 2, 1, 1, 1, 1, 0, 1, 2, 1, 0, 1, 1, 1, 2, 2, 0, 2, 1, 1, 2, 1, 1, 2, 0, 2, 1, 0, 2, 2, 1, 2, 1, 0, 1, 2, 0, 1, 2, 1, 1, 2, 1, 1, 2, 2, 0, 2, 2, 1, 2, 2, 0, 2, 1, 1, 2, 1, 1, 2, 0, 1, 1, 1, 1, 0, 1]

cp's OEIS Frontend

A338274 Number of decompositions of 2n >= 4 into an unordered sum of two primes, n - d and n + d, such that d < sqrt(2n - 1).

Table of values

List of values

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

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

cp's OEIS Frontend

A338274 Number of decompositions of 2*n >= 4 into an unordered sum of two primes, n - d and n + d, such that d < sqrt(2*n - 1).

Table of values

List of values

A338274 Number of decompositions of 2n >= 4 into an unordered sum of two primes, n - d and n + d, such that d < sqrt(2n - 1).

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