A262478 - cp's OEIS frontend

A262478 a(n) = Sum_{i >= 0} d_i(n) * p_(i + 1) where d_i(n) = i-th digit of n in base 3, and p_i = i-th prime.

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

[0, 2, 4, 3, 5, 7, 6, 8, 10, 5, 7, 9, 8, 10, 12, 11, 13, 15, 10, 12, 14, 13, 15, 17, 16, 18, 20, 7, 9, 11, 10, 12, 14, 13, 15, 17, 12, 14, 16, 15, 17, 19, 18, 20, 22, 17, 19, 21, 20, 22, 24, 23, 25, 27, 14, 16, 18, 17, 19, 21, 20, 22, 24, 19, 21, 23, 22, 24, 26, 25, 27, 29, 24, 26, 28, 27]

cp's OEIS Frontend

A262478 a(n) = Sum_{i >= 0} d_i(n) * p_(i + 1) where d_i(n) = i-th digit of n in base 3, and p_i = i-th prime.

Table of values

List of values

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

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

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