A181672 - cp's OEIS frontend

A181672 The odd terms (a1,a3,a5,...) are in an arithmetic progression (1,2,3,...), while the even terms (a2,a4,a6,...) give the number of letters of the given odd term.

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

[1, 3, 2, 3, 3, 5, 4, 4, 5, 4, 6, 3, 7, 5, 8, 5, 9, 4, 10, 3, 11, 6, 12, 6, 13, 8, 14, 8, 15, 7, 16, 7, 17, 9, 18, 8, 19, 8, 20, 6, 21, 9, 22, 9, 23, 11, 24, 10, 25, 10, 26, 9, 27, 11, 28, 11, 29, 10, 30, 6, 31, 9, 32, 9, 33, 11, 34, 10]

cp's OEIS Frontend

A181672 The odd terms (a1,a3,a5,...) are in an arithmetic progression (1,2,3,...), while the even terms (a2,a4,a6,...) give the number of letters of the given odd term.

Table of values

List of values

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

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

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