A364554 - cp's OEIS frontend

A364554 a(n) = number of primes of the form T(k)/n, for some k, where T(k)=A000217(k) is a triangular number.

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

[1, 2, 3, 1, 3, 2, 2, 1, 3, 1, 2, 2, 1, 2, 4, 1, 0, 2, 1, 1, 4, 2, 2, 2, 1, 2, 2, 0, 1, 3, 1, 0, 4, 1, 3, 2, 2, 1, 3, 2, 1, 2, 0, 1, 2, 0, 1, 2, 1, 1, 4, 1, 1, 3, 1, 1, 4, 1, 1, 3, 1, 0, 2, 1, 2, 1, 0, 2, 2, 2, 0, 0, 1, 1, 4, 1, 1, 2, 1, 0, 2, 1, 2, 2, 2, 2, 4, 0, 1, 4]

cp's OEIS Frontend

A364554 a(n) = number of primes of the form T(k)/n, for some k, where T(k)=A000217(k) is a triangular number.

Table of values

List of values

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

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

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