A144590 - cp's OEIS frontend

A144590 Number of ordered ways of writing 2n+1 = i + j, where i is a prime and j is of the form k*(k+1), k > 0.

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

[0, 0, 1, 1, 2, 1, 2, 2, 2, 3, 1, 3, 4, 1, 2, 3, 3, 3, 3, 2, 2, 5, 2, 3, 6, 1, 4, 3, 1, 5, 5, 3, 3, 4, 2, 3, 7, 3, 3, 6, 2, 4, 6, 2, 4, 5, 3, 5, 3, 3, 5, 8, 1, 2, 9, 1, 7, 7, 3, 5, 5, 3, 3, 5, 4, 4, 7, 2, 4, 8, 2, 7, 5, 2, 4, 8, 3, 4, 6, 4, 6, 7, 2, 2, 12, 2, 6, 5, 2, 8, 5, 4, 6, 7, 2, 4, 11, 3, 4, 10, 3, 7, 6, 2]

cp's OEIS Frontend

A144590 Number of ordered ways of writing 2n+1 = i + j, where i is a prime and j is of the form k*(k+1), k > 0.

Table of values

List of values

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

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

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