A227805 - cp's OEIS frontend

A227805 Sum of even numbers starting at 2, alternating signs.

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

[2, 6, 0, 8, -2, 10, -4, 12, -6, 14, -8, 16, -10, 18, -12, 20, -14, 22, -16, 24, -18, 26, -20, 28, -22, 30, -24, 32, -26, 34, -28, 36, -30, 38, -32, 40, -34, 42, -36, 44, -38, 46, -40, 48, -42, 50, -44, 52, -46, 54, -48, 56, -50, 58, -52, 60, -54, 62, -56, 64]

cp's OEIS Frontend

A227805 Sum of even numbers starting at 2, alternating signs.

Table of values

List of values

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

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

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