A236689 - cp's OEIS frontend

A236689 The sum of two neighboring digits is a palindrome; a(n) is the smallest possible nonnegative integer not occurring earlier.

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	10
8	7
9	11
10	8
11	12
12	9
13	20
14	13
15	14
16	15
17	16
18	17
19	18
20	30
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	29
29	200
30	31
31	32
32	33
33	34
34	35
35	36
36	38
37	100
38	40
39	41
40	42
41	43
42	44
43	45
44	47
45	101
46	50
47	51
48	52
49	53
50	54
51	56
52	102
53	60
54	61
55	62
56	63
57	65
58	103
59	80
60	70
61	71
62	72
63	74
64	104

[0, 1, 2, 3, 4, 5, 6, 10, 7, 11, 8, 12, 9, 20, 13, 14, 15, 16, 17, 18, 30, 21, 22, 23, 24, 25, 26, 27, 29, 200, 31, 32, 33, 34, 35, 36, 38, 100, 40, 41, 42, 43, 44, 45, 47, 101, 50, 51, 52, 53, 54, 56, 102, 60, 61, 62, 63, 65, 103, 80, 70, 71, 72, 74, 104]

cp's OEIS Frontend

A236689 The sum of two neighboring digits is a palindrome; a(n) is the smallest possible nonnegative integer not occurring earlier.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	10
8	7
9	11
10	8
11	12
12	9
13	20
14	13
15	14
16	15
17	16
18	17
19	18
20	30
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	29
29	200
30	31
31	32
32	33
33	34
34	35
35	36
36	38
37	100
38	40
39	41
40	42
41	43
42	44
43	45
44	47
45	101
46	50
47	51
48	52
49	53
50	54
51	56
52	102
53	60
54	61
55	62
56	63
57	65
58	103
59	80
60	70
61	71
62	72
63	74
64	104

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	10
8	7
9	11
10	8
11	12
12	9
13	20
14	13
15	14
16	15
17	16
18	17
19	18
20	30
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	29
29	200
30	31
31	32
32	33
33	34
34	35
35	36
36	38
37	100
38	40
39	41
40	42
41	43
42	44
43	45
44	47
45	101
46	50
47	51
48	52
49	53
50	54
51	56
52	102
53	60
54	61
55	62
56	63
57	65
58	103
59	80
60	70
61	71
62	72
63	74
64	104

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	10
8	7
9	11
10	8
11	12
12	9
13	20
14	13
15	14
16	15
17	16
18	17
19	18
20	30
21	21
22	22
23	23
24	24
25	25
26	26
27	27
28	29
29	200
30	31
31	32
32	33
33	34
34	35
35	36
36	38
37	100
38	40
39	41
40	42
41	43
42	44
43	45
44	47
45	101
46	50
47	51
48	52
49	53
50	54
51	56
52	102
53	60
54	61
55	62
56	63
57	65
58	103
59	80
60	70
61	71
62	72
63	74
64	104