A290561 - cp's OEIS frontend

A290561 a(n) = n + cos(n*Pi/2).

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

[1, 1, 1, 3, 5, 5, 5, 7, 9, 9, 9, 11, 13, 13, 13, 15, 17, 17, 17, 19, 21, 21, 21, 23, 25, 25, 25, 27, 29, 29, 29, 31, 33, 33, 33, 35, 37, 37, 37, 39, 41, 41, 41, 43, 45, 45, 45, 47, 49, 49, 49, 51, 53, 53, 53, 55, 57, 57, 57, 59, 61, 61, 61, 63, 65, 65, 65]

cp's OEIS Frontend

A290561 a(n) = n + cos(n*Pi/2).

Table of values

List of values

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

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

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