A317640 - cp's OEIS frontend

A317640 The 7x+-1 function: a(n) = 7n+1 if n == +1 (mod 4), a(n) = 7n-1 if n == -1 (mod 4), otherwise a(n) = n/2.

n	a(n)
0	0
1	8
2	1
3	20
4	2
5	36
6	3
7	48
8	4
9	64
10	5
11	76
12	6
13	92
14	7
15	104
16	8
17	120
18	9
19	132
20	10
21	148
22	11
23	160
24	12
25	176
26	13
27	188
28	14
29	204
30	15
31	216
32	16
33	232
34	17
35	244
36	18
37	260
38	19
39	272
40	20
41	288
42	21
43	300
44	22
45	316
46	23
47	328
48	24
49	344
50	25
51	356
52	26
53	372
54	27
55	384
56	28
57	400
58	29
59	412
60	30
61	428
62	31
63	440
64	32
65	456
66	33

[0, 8, 1, 20, 2, 36, 3, 48, 4, 64, 5, 76, 6, 92, 7, 104, 8, 120, 9, 132, 10, 148, 11, 160, 12, 176, 13, 188, 14, 204, 15, 216, 16, 232, 17, 244, 18, 260, 19, 272, 20, 288, 21, 300, 22, 316, 23, 328, 24, 344, 25, 356, 26, 372, 27, 384, 28, 400, 29, 412, 30, 428, 31, 440, 32, 456, 33]

cp's OEIS Frontend

A317640 The 7x+-1 function: a(n) = 7n+1 if n == +1 (mod 4), a(n) = 7n-1 if n == -1 (mod 4), otherwise a(n) = n/2.

Table of values

List of values

n	a(n)
0	0
1	8
2	1
3	20
4	2
5	36
6	3
7	48
8	4
9	64
10	5
11	76
12	6
13	92
14	7
15	104
16	8
17	120
18	9
19	132
20	10
21	148
22	11
23	160
24	12
25	176
26	13
27	188
28	14
29	204
30	15
31	216
32	16
33	232
34	17
35	244
36	18
37	260
38	19
39	272
40	20
41	288
42	21
43	300
44	22
45	316
46	23
47	328
48	24
49	344
50	25
51	356
52	26
53	372
54	27
55	384
56	28
57	400
58	29
59	412
60	30
61	428
62	31
63	440
64	32
65	456
66	33

n	a(n)
0	0
1	8
2	1
3	20
4	2
5	36
6	3
7	48
8	4
9	64
10	5
11	76
12	6
13	92
14	7
15	104
16	8
17	120
18	9
19	132
20	10
21	148
22	11
23	160
24	12
25	176
26	13
27	188
28	14
29	204
30	15
31	216
32	16
33	232
34	17
35	244
36	18
37	260
38	19
39	272
40	20
41	288
42	21
43	300
44	22
45	316
46	23
47	328
48	24
49	344
50	25
51	356
52	26
53	372
54	27
55	384
56	28
57	400
58	29
59	412
60	30
61	428
62	31
63	440
64	32
65	456
66	33

n	a(n)
0	0
1	8
2	1
3	20
4	2
5	36
6	3
7	48
8	4
9	64
10	5
11	76
12	6
13	92
14	7
15	104
16	8
17	120
18	9
19	132
20	10
21	148
22	11
23	160
24	12
25	176
26	13
27	188
28	14
29	204
30	15
31	216
32	16
33	232
34	17
35	244
36	18
37	260
38	19
39	272
40	20
41	288
42	21
43	300
44	22
45	316
46	23
47	328
48	24
49	344
50	25
51	356
52	26
53	372
54	27
55	384
56	28
57	400
58	29
59	412
60	30
61	428
62	31
63	440
64	32
65	456
66	33