A188424 - cp's OEIS frontend

A188424 Number of primes of the form k^2 + k + 2n - 1 for k = 0..2n-1.

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

[1, 2, 4, 4, 2, 10, 4, 3, 16, 6, 5, 10, 10, 5, 13, 14, 3, 10, 16, 7, 40, 8, 6, 26, 12, 9, 19, 14, 9, 34, 21, 5, 19, 36, 13, 28, 18, 7, 31, 18, 19, 34, 15, 14, 27, 27, 11, 41, 31, 11, 68, 16, 10, 71, 30, 20, 23, 21, 16, 40, 40, 13, 57, 37, 23, 37, 24, 16, 67, 44, 16, 41, 20, 20, 54, 55, 12, 43, 54, 15, 81, 26, 15, 65, 34, 37, 50, 20, 29, 70, 68, 14, 52, 46, 14, 79, 43, 18, 60, 70]

cp's OEIS Frontend

A188424 Number of primes of the form k^2 + k + 2n - 1 for k = 0..2n-1.

Table of values

List of values

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

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

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