A130722 - cp's OEIS frontend

A130722 The twice repeated nonnegative integers at even indices, the non-repeated nonnegative integers at odd indices.

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

[0, 0, 0, 1, 1, 2, 1, 3, 2, 4, 2, 5, 3, 6, 3, 7, 4, 8, 4, 9, 5, 10, 5, 11, 6, 12, 6, 13, 7, 14, 7, 15, 8, 16, 8, 17, 9, 18, 9, 19, 10, 20, 10, 21, 11, 22, 11, 23, 12, 24, 12, 25, 13, 26, 13, 27, 14, 28, 14, 29, 15, 30, 15, 31, 16, 32, 16, 33, 17, 34, 17, 35, 18, 36, 18, 37, 19, 38, 19, 39]

cp's OEIS Frontend

A130722 The twice repeated nonnegative integers at even indices, the non-repeated nonnegative integers at odd indices.

Table of values

List of values

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

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

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