A338742 - cp's OEIS frontend

A338742 When a(n) is even, a(n) is the number of even digits present so far in the sequence, a(n) included.

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

[1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 2, 23, 4, 25, 6, 27, 8, 29, 10, 31, 33, 35, 37, 39, 41, 12, 43, 14, 45, 16, 47, 18, 20, 22, 24, 26, 28, 49, 30, 51, 53, 55, 57, 59, 61, 32, 63, 34, 65, 36, 67, 38, 40, 42, 44, 46, 48, 69, 50, 71, 73, 75, 77, 79, 81, 52, 83, 54, 85, 56, 87, 58, 60, 62, 64, 66, 68, 89]

cp's OEIS Frontend

A338742 When a(n) is even, a(n) is the number of even digits present so far in the sequence, a(n) included.

Table of values

List of values

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

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

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