A263100 - cp's OEIS frontend

A263100 Number of ordered pairs (k, m) with k > 0 and m > 0 such that n = pi(k^2) + pi(m^2/2), where pi(x) denotes the number of primes not exceeding x.

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

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

cp's OEIS Frontend

A263100 Number of ordered pairs (k, m) with k > 0 and m > 0 such that n = pi(k^2) + pi(m^2/2), where pi(x) denotes the number of primes not exceeding x.

Table of values

List of values

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

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

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