A374578 - cp's OEIS frontend

A374578 Pierpont primes are primes of the form 2^t*3^u + 1; this sequence gives the u's in order.

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

[0, 0, 0, 1, 1, 0, 2, 2, 2, 1, 3, 4, 1, 0, 3, 5, 2, 1, 2, 4, 6, 4, 6, 3, 5, 4, 1, 7, 2, 9, 8, 0, 7, 2, 8, 4, 10, 9, 6, 1, 8, 5, 2, 6, 3, 5, 4, 9, 4, 12, 11, 3, 14, 3, 15, 5, 7, 16, 13, 3, 10, 4, 17, 10, 11, 12, 3, 4, 1, 8, 5, 8, 4, 11, 7, 15, 12, 2, 10, 1, 22, 4]

cp's OEIS Frontend

A374578 Pierpont primes are primes of the form 2^t*3^u + 1; this sequence gives the u's in order.

Table of values

List of values

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

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

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