A121759 - cp's OEIS frontend

A121759 In decimal number system, take even digits of n with negative sign.

n	a(n)
1	1
2	-2
3	3
4	-4
5	5
6	-6
7	7
8	-8
9	9
10	10
11	11
12	8
13	13
14	6
15	15
16	4
17	17
18	2
19	19
20	-20
21	-19
22	-22
23	-17
24	-24
25	-15
26	-26
27	-13
28	-28
29	-11
30	30
31	31
32	28
33	33
34	26
35	35
36	24
37	37
38	22
39	39
40	-40
41	-39
42	-42
43	-37
44	-44
45	-35
46	-46
47	-33
48	-48
49	-31
50	50
51	51
52	48
53	53
54	46
55	55
56	44
57	57
58	42
59	59
60	-60
61	-59
62	-62
63	-57
64	-64
65	-55
66	-66
67	-53
68	-68
69	-51
70	70
71	71
72	68
73	73
74	66
75	75
76	64
77	77
78	62

[1, -2, 3, -4, 5, -6, 7, -8, 9, 10, 11, 8, 13, 6, 15, 4, 17, 2, 19, -20, -19, -22, -17, -24, -15, -26, -13, -28, -11, 30, 31, 28, 33, 26, 35, 24, 37, 22, 39, -40, -39, -42, -37, -44, -35, -46, -33, -48, -31, 50, 51, 48, 53, 46, 55, 44, 57, 42, 59, -60, -59, -62, -57, -64, -55, -66, -53, -68, -51, 70, 71, 68, 73, 66, 75, 64, 77, 62]

cp's OEIS Frontend

A121759 In decimal number system, take even digits of n with negative sign.

Table of values

List of values

n	a(n)
1	1
2	-2
3	3
4	-4
5	5
6	-6
7	7
8	-8
9	9
10	10
11	11
12	8
13	13
14	6
15	15
16	4
17	17
18	2
19	19
20	-20
21	-19
22	-22
23	-17
24	-24
25	-15
26	-26
27	-13
28	-28
29	-11
30	30
31	31
32	28
33	33
34	26
35	35
36	24
37	37
38	22
39	39
40	-40
41	-39
42	-42
43	-37
44	-44
45	-35
46	-46
47	-33
48	-48
49	-31
50	50
51	51
52	48
53	53
54	46
55	55
56	44
57	57
58	42
59	59
60	-60
61	-59
62	-62
63	-57
64	-64
65	-55
66	-66
67	-53
68	-68
69	-51
70	70
71	71
72	68
73	73
74	66
75	75
76	64
77	77
78	62

n	a(n)
1	1
2	-2
3	3
4	-4
5	5
6	-6
7	7
8	-8
9	9
10	10
11	11
12	8
13	13
14	6
15	15
16	4
17	17
18	2
19	19
20	-20
21	-19
22	-22
23	-17
24	-24
25	-15
26	-26
27	-13
28	-28
29	-11
30	30
31	31
32	28
33	33
34	26
35	35
36	24
37	37
38	22
39	39
40	-40
41	-39
42	-42
43	-37
44	-44
45	-35
46	-46
47	-33
48	-48
49	-31
50	50
51	51
52	48
53	53
54	46
55	55
56	44
57	57
58	42
59	59
60	-60
61	-59
62	-62
63	-57
64	-64
65	-55
66	-66
67	-53
68	-68
69	-51
70	70
71	71
72	68
73	73
74	66
75	75
76	64
77	77
78	62

n	a(n)
1	1
2	-2
3	3
4	-4
5	5
6	-6
7	7
8	-8
9	9
10	10
11	11
12	8
13	13
14	6
15	15
16	4
17	17
18	2
19	19
20	-20
21	-19
22	-22
23	-17
24	-24
25	-15
26	-26
27	-13
28	-28
29	-11
30	30
31	31
32	28
33	33
34	26
35	35
36	24
37	37
38	22
39	39
40	-40
41	-39
42	-42
43	-37
44	-44
45	-35
46	-46
47	-33
48	-48
49	-31
50	50
51	51
52	48
53	53
54	46
55	55
56	44
57	57
58	42
59	59
60	-60
61	-59
62	-62
63	-57
64	-64
65	-55
66	-66
67	-53
68	-68
69	-51
70	70
71	71
72	68
73	73
74	66
75	75
76	64
77	77
78	62