A249278 - cp's OEIS frontend

A249278 Lexicographically earliest permutation of the nonnegative integers such that the parity of the first digit of a(n+1) equals that of a(n)'s last digit.

n	a(n)
0	0
1	2
2	4
3	6
4	8
5	20
6	21
7	1
8	3
9	5
10	7
11	9
12	10
13	22
14	23
15	11
16	12
17	24
18	25
19	13
20	14
21	26
22	27
23	15
24	16
25	28
26	29
27	17
28	18
29	40
30	41
31	19
32	30
33	42
34	43
35	31
36	32
37	44
38	45
39	33
40	34
41	46
42	47
43	35
44	36
45	48
46	49
47	37
48	38
49	60
50	61
51	39
52	50
53	62
54	63
55	51
56	52
57	64
58	65
59	53
60	54
61	66
62	67
63	55
64	56
65	68
66	69
67	57
68	58
69	80
70	81
71	59
72	70
73	82
74	83
75	71
76	72
77	84
78	85
79	73
80	74
81	86
82	87
83	75
84	76
85	88
86	89
87	77
88	78
89	200
90	201

[0, 2, 4, 6, 8, 20, 21, 1, 3, 5, 7, 9, 10, 22, 23, 11, 12, 24, 25, 13, 14, 26, 27, 15, 16, 28, 29, 17, 18, 40, 41, 19, 30, 42, 43, 31, 32, 44, 45, 33, 34, 46, 47, 35, 36, 48, 49, 37, 38, 60, 61, 39, 50, 62, 63, 51, 52, 64, 65, 53, 54, 66, 67, 55, 56, 68, 69, 57, 58, 80, 81, 59, 70, 82, 83, 71, 72, 84, 85, 73, 74, 86, 87, 75, 76, 88, 89, 77, 78, 200, 201]

cp's OEIS Frontend

A249278 Lexicographically earliest permutation of the nonnegative integers such that the parity of the first digit of a(n+1) equals that of a(n)'s last digit.

Table of values

List of values

n	a(n)
0	0
1	2
2	4
3	6
4	8
5	20
6	21
7	1
8	3
9	5
10	7
11	9
12	10
13	22
14	23
15	11
16	12
17	24
18	25
19	13
20	14
21	26
22	27
23	15
24	16
25	28
26	29
27	17
28	18
29	40
30	41
31	19
32	30
33	42
34	43
35	31
36	32
37	44
38	45
39	33
40	34
41	46
42	47
43	35
44	36
45	48
46	49
47	37
48	38
49	60
50	61
51	39
52	50
53	62
54	63
55	51
56	52
57	64
58	65
59	53
60	54
61	66
62	67
63	55
64	56
65	68
66	69
67	57
68	58
69	80
70	81
71	59
72	70
73	82
74	83
75	71
76	72
77	84
78	85
79	73
80	74
81	86
82	87
83	75
84	76
85	88
86	89
87	77
88	78
89	200
90	201

n	a(n)
0	0
1	2
2	4
3	6
4	8
5	20
6	21
7	1
8	3
9	5
10	7
11	9
12	10
13	22
14	23
15	11
16	12
17	24
18	25
19	13
20	14
21	26
22	27
23	15
24	16
25	28
26	29
27	17
28	18
29	40
30	41
31	19
32	30
33	42
34	43
35	31
36	32
37	44
38	45
39	33
40	34
41	46
42	47
43	35
44	36
45	48
46	49
47	37
48	38
49	60
50	61
51	39
52	50
53	62
54	63
55	51
56	52
57	64
58	65
59	53
60	54
61	66
62	67
63	55
64	56
65	68
66	69
67	57
68	58
69	80
70	81
71	59
72	70
73	82
74	83
75	71
76	72
77	84
78	85
79	73
80	74
81	86
82	87
83	75
84	76
85	88
86	89
87	77
88	78
89	200
90	201

n	a(n)
0	0
1	2
2	4
3	6
4	8
5	20
6	21
7	1
8	3
9	5
10	7
11	9
12	10
13	22
14	23
15	11
16	12
17	24
18	25
19	13
20	14
21	26
22	27
23	15
24	16
25	28
26	29
27	17
28	18
29	40
30	41
31	19
32	30
33	42
34	43
35	31
36	32
37	44
38	45
39	33
40	34
41	46
42	47
43	35
44	36
45	48
46	49
47	37
48	38
49	60
50	61
51	39
52	50
53	62
54	63
55	51
56	52
57	64
58	65
59	53
60	54
61	66
62	67
63	55
64	56
65	68
66	69
67	57
68	58
69	80
70	81
71	59
72	70
73	82
74	83
75	71
76	72
77	84
78	85
79	73
80	74
81	86
82	87
83	75
84	76
85	88
86	89
87	77
88	78
89	200
90	201