A096369 - cp's OEIS frontend

A096369 Triangle read by rows, 0<=k T(n,k) = #{p prime: b(k)=1 and 2^(n-1) <= p=Sum(b(i)*2^i:0<=b(i)<2) < 2^n}.

n	a(n)
1	0
2	1
3	2
4	2
5	1
6	2
7	2
8	1
9	1
10	2
11	5
12	3
13	3
14	2
15	5
16	7
17	3
18	4
19	5
20	3
21	7
22	13
23	7
24	6
25	6
26	4
27	7
28	13
29	23
30	13
31	12
32	9
33	10
34	12
35	11
36	23
37	43
38	22
39	23
40	22
41	23
42	22
43	21
44	21
45	43
46	75
47	37
48	37
49	36
50	40
51	39
52	38
53	38
54	37
55	75
56	137
57	71
58	71
59	73
60	66
61	56
62	71
63	70
64	66
65	67
66	137
67	255
68	128
69	125
70	130
71	127
72	132
73	128
74	130
75	129
76	126
77	125
78	255

[0, 1, 2, 2, 1, 2, 2, 1, 1, 2, 5, 3, 3, 2, 5, 7, 3, 4, 5, 3, 7, 13, 7, 6, 6, 4, 7, 13, 23, 13, 12, 9, 10, 12, 11, 23, 43, 22, 23, 22, 23, 22, 21, 21, 43, 75, 37, 37, 36, 40, 39, 38, 38, 37, 75, 137, 71, 71, 73, 66, 56, 71, 70, 66, 67, 137, 255, 128, 125, 130, 127, 132, 128, 130, 129, 126, 125, 255]

cp's OEIS Frontend

A096369 Triangle read by rows, 0<=k T(n,k) = #{p prime: b(k)=1 and 2^(n-1) <= p=Sum(b(i)*2^i:0<=b(i)<2) < 2^n}.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	2
5	1
6	2
7	2
8	1
9	1
10	2
11	5
12	3
13	3
14	2
15	5
16	7
17	3
18	4
19	5
20	3
21	7
22	13
23	7
24	6
25	6
26	4
27	7
28	13
29	23
30	13
31	12
32	9
33	10
34	12
35	11
36	23
37	43
38	22
39	23
40	22
41	23
42	22
43	21
44	21
45	43
46	75
47	37
48	37
49	36
50	40
51	39
52	38
53	38
54	37
55	75
56	137
57	71
58	71
59	73
60	66
61	56
62	71
63	70
64	66
65	67
66	137
67	255
68	128
69	125
70	130
71	127
72	132
73	128
74	130
75	129
76	126
77	125
78	255

n	a(n)
1	0
2	1
3	2
4	2
5	1
6	2
7	2
8	1
9	1
10	2
11	5
12	3
13	3
14	2
15	5
16	7
17	3
18	4
19	5
20	3
21	7
22	13
23	7
24	6
25	6
26	4
27	7
28	13
29	23
30	13
31	12
32	9
33	10
34	12
35	11
36	23
37	43
38	22
39	23
40	22
41	23
42	22
43	21
44	21
45	43
46	75
47	37
48	37
49	36
50	40
51	39
52	38
53	38
54	37
55	75
56	137
57	71
58	71
59	73
60	66
61	56
62	71
63	70
64	66
65	67
66	137
67	255
68	128
69	125
70	130
71	127
72	132
73	128
74	130
75	129
76	126
77	125
78	255

n	a(n)
1	0
2	1
3	2
4	2
5	1
6	2
7	2
8	1
9	1
10	2
11	5
12	3
13	3
14	2
15	5
16	7
17	3
18	4
19	5
20	3
21	7
22	13
23	7
24	6
25	6
26	4
27	7
28	13
29	23
30	13
31	12
32	9
33	10
34	12
35	11
36	23
37	43
38	22
39	23
40	22
41	23
42	22
43	21
44	21
45	43
46	75
47	37
48	37
49	36
50	40
51	39
52	38
53	38
54	37
55	75
56	137
57	71
58	71
59	73
60	66
61	56
62	71
63	70
64	66
65	67
66	137
67	255
68	128
69	125
70	130
71	127
72	132
73	128
74	130
75	129
76	126
77	125
78	255