A262995 - cp's OEIS frontend

A262995 Number of ordered pairs (k,m) with k > 0 and m > 0 such that n = pi(k(k+1)/2) + pi(1+m(m+1)/2), where pi(x) denotes the number of primes not exceeding x.

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

[1, 1, 1, 3, 3, 3, 3, 5, 3, 6, 3, 6, 4, 6, 4, 7, 4, 6, 6, 6, 4, 8, 5, 6, 6, 7, 5, 8, 4, 9, 5, 7, 9, 5, 7, 8, 6, 9, 5, 9, 7, 7, 8, 8, 6, 8, 8, 8, 6, 7, 10, 8, 4, 12, 6, 8, 7, 9, 6, 10, 6, 8, 10, 8, 6, 12, 4, 12, 6, 11, 6, 11, 6, 9, 10, 8, 7, 11, 7, 10, 8, 9, 7, 10, 7, 13, 5, 7, 11, 9, 6, 8, 12, 8, 7, 11, 7, 12, 5]

cp's OEIS Frontend

A262995 Number of ordered pairs (k,m) with k > 0 and m > 0 such that n = pi(k(k+1)/2) + pi(1+m(m+1)/2), where pi(x) denotes the number of primes not exceeding x.

Table of values

List of values

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

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

cp's OEIS Frontend

A262995 Number of ordered pairs (k,m) with k > 0 and m > 0 such that n = pi(k*(k+1)/2) + pi(1+m*(m+1)/2), where pi(x) denotes the number of primes not exceeding x.

Table of values

List of values

A262995 Number of ordered pairs (k,m) with k > 0 and m > 0 such that n = pi(k(k+1)/2) + pi(1+m(m+1)/2), where pi(x) denotes the number of primes not exceeding x.

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