A330313 - cp's OEIS frontend

A330313 Add the odd terms and subtract the even ones, the result must always be a palindrome in base 3. This is the lexicographically earliest sequence of distinct positive integers with this property.

n	a(n)
1	1
2	3
3	2
4	11
5	7
6	4
7	6
8	8
9	21
10	5
11	12
12	14
13	89
14	9
15	18
16	26
17	16
18	20
19	10
20	13
21	17
22	24
23	75
24	39
25	30
26	32
27	23
28	51
29	31
30	22
31	43
32	34
33	48
34	44
35	28
36	36
37	19
38	29
39	42
40	81
41	68
42	33
43	35
44	69
45	60
46	72
47	63
48	73
49	52
50	56
51	40
52	105
53	61
54	70
55	84
56	93
57	91
58	82
59	50
60	41
61	98
62	45
63	53
64	103
65	64
66	78
67	54
68	123
69	128
70	57
71	71
72	129

[1, 3, 2, 11, 7, 4, 6, 8, 21, 5, 12, 14, 89, 9, 18, 26, 16, 20, 10, 13, 17, 24, 75, 39, 30, 32, 23, 51, 31, 22, 43, 34, 48, 44, 28, 36, 19, 29, 42, 81, 68, 33, 35, 69, 60, 72, 63, 73, 52, 56, 40, 105, 61, 70, 84, 93, 91, 82, 50, 41, 98, 45, 53, 103, 64, 78, 54, 123, 128, 57, 71, 129]

cp's OEIS Frontend

A330313 Add the odd terms and subtract the even ones, the result must always be a palindrome in base 3. This is the lexicographically earliest sequence of distinct positive integers with this property.

Table of values

List of values

n	a(n)
1	1
2	3
3	2
4	11
5	7
6	4
7	6
8	8
9	21
10	5
11	12
12	14
13	89
14	9
15	18
16	26
17	16
18	20
19	10
20	13
21	17
22	24
23	75
24	39
25	30
26	32
27	23
28	51
29	31
30	22
31	43
32	34
33	48
34	44
35	28
36	36
37	19
38	29
39	42
40	81
41	68
42	33
43	35
44	69
45	60
46	72
47	63
48	73
49	52
50	56
51	40
52	105
53	61
54	70
55	84
56	93
57	91
58	82
59	50
60	41
61	98
62	45
63	53
64	103
65	64
66	78
67	54
68	123
69	128
70	57
71	71
72	129

n	a(n)
1	1
2	3
3	2
4	11
5	7
6	4
7	6
8	8
9	21
10	5
11	12
12	14
13	89
14	9
15	18
16	26
17	16
18	20
19	10
20	13
21	17
22	24
23	75
24	39
25	30
26	32
27	23
28	51
29	31
30	22
31	43
32	34
33	48
34	44
35	28
36	36
37	19
38	29
39	42
40	81
41	68
42	33
43	35
44	69
45	60
46	72
47	63
48	73
49	52
50	56
51	40
52	105
53	61
54	70
55	84
56	93
57	91
58	82
59	50
60	41
61	98
62	45
63	53
64	103
65	64
66	78
67	54
68	123
69	128
70	57
71	71
72	129

n	a(n)
1	1
2	3
3	2
4	11
5	7
6	4
7	6
8	8
9	21
10	5
11	12
12	14
13	89
14	9
15	18
16	26
17	16
18	20
19	10
20	13
21	17
22	24
23	75
24	39
25	30
26	32
27	23
28	51
29	31
30	22
31	43
32	34
33	48
34	44
35	28
36	36
37	19
38	29
39	42
40	81
41	68
42	33
43	35
44	69
45	60
46	72
47	63
48	73
49	52
50	56
51	40
52	105
53	61
54	70
55	84
56	93
57	91
58	82
59	50
60	41
61	98
62	45
63	53
64	103
65	64
66	78
67	54
68	123
69	128
70	57
71	71
72	129