A227832 - cp's OEIS frontend

A227832 Sum of odd numbers starting with 1, alternating signs (beginning with plus).

n	a(n)
1	1
2	4
3	-1
4	6
5	-3
6	8
7	-5
8	10
9	-7
10	12
11	-9
12	14
13	-11
14	16
15	-13
16	18
17	-15
18	20
19	-17
20	22
21	-19
22	24
23	-21
24	26
25	-23
26	28
27	-25
28	30
29	-27
30	32
31	-29
32	34
33	-31
34	36
35	-33
36	38
37	-35
38	40
39	-37
40	42
41	-39
42	44
43	-41
44	46
45	-43
46	48
47	-45
48	50
49	-47
50	52
51	-49

[1, 4, -1, 6, -3, 8, -5, 10, -7, 12, -9, 14, -11, 16, -13, 18, -15, 20, -17, 22, -19, 24, -21, 26, -23, 28, -25, 30, -27, 32, -29, 34, -31, 36, -33, 38, -35, 40, -37, 42, -39, 44, -41, 46, -43, 48, -45, 50, -47, 52, -49]

cp's OEIS Frontend

A227832 Sum of odd numbers starting with 1, alternating signs (beginning with plus).

Table of values

List of values

n	a(n)
1	1
2	4
3	-1
4	6
5	-3
6	8
7	-5
8	10
9	-7
10	12
11	-9
12	14
13	-11
14	16
15	-13
16	18
17	-15
18	20
19	-17
20	22
21	-19
22	24
23	-21
24	26
25	-23
26	28
27	-25
28	30
29	-27
30	32
31	-29
32	34
33	-31
34	36
35	-33
36	38
37	-35
38	40
39	-37
40	42
41	-39
42	44
43	-41
44	46
45	-43
46	48
47	-45
48	50
49	-47
50	52
51	-49

n	a(n)
1	1
2	4
3	-1
4	6
5	-3
6	8
7	-5
8	10
9	-7
10	12
11	-9
12	14
13	-11
14	16
15	-13
16	18
17	-15
18	20
19	-17
20	22
21	-19
22	24
23	-21
24	26
25	-23
26	28
27	-25
28	30
29	-27
30	32
31	-29
32	34
33	-31
34	36
35	-33
36	38
37	-35
38	40
39	-37
40	42
41	-39
42	44
43	-41
44	46
45	-43
46	48
47	-45
48	50
49	-47
50	52
51	-49

n	a(n)
1	1
2	4
3	-1
4	6
5	-3
6	8
7	-5
8	10
9	-7
10	12
11	-9
12	14
13	-11
14	16
15	-13
16	18
17	-15
18	20
19	-17
20	22
21	-19
22	24
23	-21
24	26
25	-23
26	28
27	-25
28	30
29	-27
30	32
31	-29
32	34
33	-31
34	36
35	-33
36	38
37	-35
38	40
39	-37
40	42
41	-39
42	44
43	-41
44	46
45	-43
46	48
47	-45
48	50
49	-47
50	52
51	-49