A180412 - cp's OEIS frontend

A180412 Lexicographically earliest increasing sequence of numbers with all odd digits alternating with numbers with all even digits.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	20
11	31
12	40
13	51
14	60
15	71
16	80
17	91
18	200
19	311
20	400
21	511
22	600
23	711
24	800
25	911
26	2000
27	3111
28	4000
29	5111
30	6000
31	7111
32	8000
33	9111
34	20000
35	31111
36	40000
37	51111
38	60000
39	71111
40	80000
41	91111
42	200000
43	311111
44	400000
45	511111
46	600000
47	711111
48	800000
49	911111
50	2000000

[1, 2, 3, 4, 5, 6, 7, 8, 9, 20, 31, 40, 51, 60, 71, 80, 91, 200, 311, 400, 511, 600, 711, 800, 911, 2000, 3111, 4000, 5111, 6000, 7111, 8000, 9111, 20000, 31111, 40000, 51111, 60000, 71111, 80000, 91111, 200000, 311111, 400000, 511111, 600000, 711111, 800000, 911111, 2000000]

cp's OEIS Frontend

A180412 Lexicographically earliest increasing sequence of numbers with all odd digits alternating with numbers with all even digits.

Table of values

List of values