A290562 - cp's OEIS frontend

A290562 a(n) = n - cos(n*Pi/2).

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

[-1, 1, 3, 3, 3, 5, 7, 7, 7, 9, 11, 11, 11, 13, 15, 15, 15, 17, 19, 19, 19, 21, 23, 23, 23, 25, 27, 27, 27, 29, 31, 31, 31, 33, 35, 35, 35, 37, 39, 39, 39, 41, 43, 43, 43, 45, 47, 47, 47, 49, 51, 51, 51, 53, 55, 55, 55, 57, 59, 59, 59, 61, 63, 63, 63, 65, 67]

cp's OEIS Frontend

A290562 a(n) = n - cos(n*Pi/2).

Table of values

List of values

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

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

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