A043060 - cp's OEIS frontend

A043060 a(n)=(s(n)+5)/7, where s(n)=n-th base 7 palindrome that starts with 2.

n	a(n)
1	1
2	3
3	15
4	16
5	17
6	18
7	19
8	20
9	21
10	99
11	107
12	115
13	123
14	131
15	139
16	147
17	687
18	694
19	701
20	708
21	715
22	722
23	729
24	737
25	744
26	751
27	758
28	765
29	772
30	779
31	787
32	794
33	801
34	808
35	815
36	822
37	829
38	837
39	844
40	851
41	858
42	865
43	872
44	879
45	887
46	894
47	901
48	908

[1, 3, 15, 16, 17, 18, 19, 20, 21, 99, 107, 115, 123, 131, 139, 147, 687, 694, 701, 708, 715, 722, 729, 737, 744, 751, 758, 765, 772, 779, 787, 794, 801, 808, 815, 822, 829, 837, 844, 851, 858, 865, 872, 879, 887, 894, 901, 908]

cp's OEIS Frontend

A043060 a(n)=(s(n)+5)/7, where s(n)=n-th base 7 palindrome that starts with 2.

Table of values

List of values

n	a(n)
1	1
2	3
3	15
4	16
5	17
6	18
7	19
8	20
9	21
10	99
11	107
12	115
13	123
14	131
15	139
16	147
17	687
18	694
19	701
20	708
21	715
22	722
23	729
24	737
25	744
26	751
27	758
28	765
29	772
30	779
31	787
32	794
33	801
34	808
35	815
36	822
37	829
38	837
39	844
40	851
41	858
42	865
43	872
44	879
45	887
46	894
47	901
48	908

n	a(n)
1	1
2	3
3	15
4	16
5	17
6	18
7	19
8	20
9	21
10	99
11	107
12	115
13	123
14	131
15	139
16	147
17	687
18	694
19	701
20	708
21	715
22	722
23	729
24	737
25	744
26	751
27	758
28	765
29	772
30	779
31	787
32	794
33	801
34	808
35	815
36	822
37	829
38	837
39	844
40	851
41	858
42	865
43	872
44	879
45	887
46	894
47	901
48	908

n	a(n)
1	1
2	3
3	15
4	16
5	17
6	18
7	19
8	20
9	21
10	99
11	107
12	115
13	123
14	131
15	139
16	147
17	687
18	694
19	701
20	708
21	715
22	722
23	729
24	737
25	744
26	751
27	758
28	765
29	772
30	779
31	787
32	794
33	801
34	808
35	815
36	822
37	829
38	837
39	844
40	851
41	858
42	865
43	872
44	879
45	887
46	894
47	901
48	908