A306890 - cp's OEIS frontend

A306890 a(n) is the number of prime digits used in writing out all primes up to and including the n-th prime.

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

[1, 2, 3, 4, 4, 5, 6, 6, 8, 9, 10, 12, 12, 13, 14, 16, 17, 17, 18, 19, 21, 22, 23, 23, 24, 24, 25, 26, 26, 27, 29, 30, 32, 33, 33, 34, 36, 37, 38, 40, 41, 41, 41, 42, 43, 43, 44, 47, 50, 52, 55, 57, 58, 60, 63, 65, 66, 68, 71, 72, 74, 76, 78, 79]

cp's OEIS Frontend

A306890 a(n) is the number of prime digits used in writing out all primes up to and including the n-th prime.

Table of values

List of values

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

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

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