A215898 - cp's OEIS frontend

A215898 a(4n) = 1+4n, a(1+4n) = -2-6n, a(2+4n) = 4+6n, a(3+4n) = -3-4n.

n	a(n)
0	1
1	-2
2	4
3	-3
4	5
5	-8
6	10
7	-7
8	9
9	-14
10	16
11	-11
12	13
13	-20
14	22
15	-15
16	17
17	-26
18	28
19	-19
20	21
21	-32
22	34
23	-23
24	25
25	-38
26	40
27	-27
28	29
29	-44
30	46
31	-31
32	33
33	-50
34	52
35	-35
36	37
37	-56
38	58
39	-39
40	41
41	-62
42	64
43	-43
44	45
45	-68
46	70
47	-47
48	49
49	-74
50	76
51	-51
52	53
53	-80
54	82
55	-55
56	57
57	-86
58	88
59	-59

[1, -2, 4, -3, 5, -8, 10, -7, 9, -14, 16, -11, 13, -20, 22, -15, 17, -26, 28, -19, 21, -32, 34, -23, 25, -38, 40, -27, 29, -44, 46, -31, 33, -50, 52, -35, 37, -56, 58, -39, 41, -62, 64, -43, 45, -68, 70, -47, 49, -74, 76, -51, 53, -80, 82, -55, 57, -86, 88, -59]

cp's OEIS Frontend

A215898 a(4n) = 1+4n, a(1+4n) = -2-6n, a(2+4n) = 4+6n, a(3+4n) = -3-4n.

Table of values

List of values

n	a(n)
0	1
1	-2
2	4
3	-3
4	5
5	-8
6	10
7	-7
8	9
9	-14
10	16
11	-11
12	13
13	-20
14	22
15	-15
16	17
17	-26
18	28
19	-19
20	21
21	-32
22	34
23	-23
24	25
25	-38
26	40
27	-27
28	29
29	-44
30	46
31	-31
32	33
33	-50
34	52
35	-35
36	37
37	-56
38	58
39	-39
40	41
41	-62
42	64
43	-43
44	45
45	-68
46	70
47	-47
48	49
49	-74
50	76
51	-51
52	53
53	-80
54	82
55	-55
56	57
57	-86
58	88
59	-59

n	a(n)
0	1
1	-2
2	4
3	-3
4	5
5	-8
6	10
7	-7
8	9
9	-14
10	16
11	-11
12	13
13	-20
14	22
15	-15
16	17
17	-26
18	28
19	-19
20	21
21	-32
22	34
23	-23
24	25
25	-38
26	40
27	-27
28	29
29	-44
30	46
31	-31
32	33
33	-50
34	52
35	-35
36	37
37	-56
38	58
39	-39
40	41
41	-62
42	64
43	-43
44	45
45	-68
46	70
47	-47
48	49
49	-74
50	76
51	-51
52	53
53	-80
54	82
55	-55
56	57
57	-86
58	88
59	-59

n	a(n)
0	1
1	-2
2	4
3	-3
4	5
5	-8
6	10
7	-7
8	9
9	-14
10	16
11	-11
12	13
13	-20
14	22
15	-15
16	17
17	-26
18	28
19	-19
20	21
21	-32
22	34
23	-23
24	25
25	-38
26	40
27	-27
28	29
29	-44
30	46
31	-31
32	33
33	-50
34	52
35	-35
36	37
37	-56
38	58
39	-39
40	41
41	-62
42	64
43	-43
44	45
45	-68
46	70
47	-47
48	49
49	-74
50	76
51	-51
52	53
53	-80
54	82
55	-55
56	57
57	-86
58	88
59	-59