A337123 - cp's OEIS frontend

A337123 a(n) is the number of primes p in the n-digit "signed nonadjacent form" such that p has 3 or fewer nonzero digits.

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

[0, 1, 2, 1, 4, 5, 7, 5, 9, 8, 12, 7, 11, 7, 11, 9, 14, 10, 18, 11, 21, 7, 9, 11, 16, 4, 8, 9, 7, 12, 18, 13, 14, 11, 10, 9, 18, 7, 12, 10, 18, 12, 22, 5, 11, 13, 16, 13, 22, 8, 9, 16, 13, 9, 13, 14, 10, 11, 10, 10, 20, 15, 9, 10, 13, 8, 22, 10, 10, 10, 12, 13]

cp's OEIS Frontend

A337123 a(n) is the number of primes p in the n-digit "signed nonadjacent form" such that p has 3 or fewer nonzero digits.

Table of values

List of values

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

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

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