A257474 - cp's OEIS frontend

A257474 Number of unordered ways to write n = a + b, where a and b are distinct elements of the set {floor(x/3): 3x-1 and 3x+1 are twin prime}, one of a and b is even, and one of a and b has the form p-1 or p-2 with p prime.

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

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

cp's OEIS Frontend

A257474 Number of unordered ways to write n = a + b, where a and b are distinct elements of the set {floor(x/3): 3x-1 and 3x+1 are twin prime}, one of a and b is even, and one of a and b has the form p-1 or p-2 with p prime.

Table of values

List of values

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

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

cp's OEIS Frontend

A257474 Number of unordered ways to write n = a + b, where a and b are distinct elements of the set {floor(x/3): 3*x-1 and 3*x+1 are twin prime}, one of a and b is even, and one of a and b has the form p-1 or p-2 with p prime.

Table of values

List of values

A257474 Number of unordered ways to write n = a + b, where a and b are distinct elements of the set {floor(x/3): 3x-1 and 3x+1 are twin prime}, one of a and b is even, and one of a and b has the form p-1 or p-2 with p prime.

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