A261304 - cp's OEIS frontend

A261304 a(n+1) = abs(a(n) - gcd(a(n), 4n+3)), a(1) = 1.

n	a(n)
1	1
2	0
3	11
4	10
5	9
6	8
7	7
8	6
9	5
10	4
11	3
12	2
13	1
14	0
15	59
16	58
17	57
18	56
19	55
20	54
21	53
22	52
23	39
24	38
25	37
26	36
27	35
28	34
29	33
30	32
31	31
32	30
33	29
34	28
35	27
36	26
37	25
38	24
39	23
40	22
41	21
42	20
43	19
44	18
45	17
46	16
47	15
48	14
49	13
50	12
51	11
52	10
53	9
54	8
55	7
56	6
57	5
58	4
59	3
60	2
61	1
62	0
63	251
64	250
65	249
66	248
67	247
68	246
69	245
70	244
71	243
72	242
73	241
74	240
75	239
76	238
77	237
78	236

[1, 0, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 59, 58, 57, 56, 55, 54, 53, 52, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 251, 250, 249, 248, 247, 246, 245, 244, 243, 242, 241, 240, 239, 238, 237, 236]

cp's OEIS Frontend

A261304 a(n+1) = abs(a(n) - gcd(a(n), 4n+3)), a(1) = 1.

Table of values

List of values

n	a(n)
1	1
2	0
3	11
4	10
5	9
6	8
7	7
8	6
9	5
10	4
11	3
12	2
13	1
14	0
15	59
16	58
17	57
18	56
19	55
20	54
21	53
22	52
23	39
24	38
25	37
26	36
27	35
28	34
29	33
30	32
31	31
32	30
33	29
34	28
35	27
36	26
37	25
38	24
39	23
40	22
41	21
42	20
43	19
44	18
45	17
46	16
47	15
48	14
49	13
50	12
51	11
52	10
53	9
54	8
55	7
56	6
57	5
58	4
59	3
60	2
61	1
62	0
63	251
64	250
65	249
66	248
67	247
68	246
69	245
70	244
71	243
72	242
73	241
74	240
75	239
76	238
77	237
78	236

n	a(n)
1	1
2	0
3	11
4	10
5	9
6	8
7	7
8	6
9	5
10	4
11	3
12	2
13	1
14	0
15	59
16	58
17	57
18	56
19	55
20	54
21	53
22	52
23	39
24	38
25	37
26	36
27	35
28	34
29	33
30	32
31	31
32	30
33	29
34	28
35	27
36	26
37	25
38	24
39	23
40	22
41	21
42	20
43	19
44	18
45	17
46	16
47	15
48	14
49	13
50	12
51	11
52	10
53	9
54	8
55	7
56	6
57	5
58	4
59	3
60	2
61	1
62	0
63	251
64	250
65	249
66	248
67	247
68	246
69	245
70	244
71	243
72	242
73	241
74	240
75	239
76	238
77	237
78	236

n	a(n)
1	1
2	0
3	11
4	10
5	9
6	8
7	7
8	6
9	5
10	4
11	3
12	2
13	1
14	0
15	59
16	58
17	57
18	56
19	55
20	54
21	53
22	52
23	39
24	38
25	37
26	36
27	35
28	34
29	33
30	32
31	31
32	30
33	29
34	28
35	27
36	26
37	25
38	24
39	23
40	22
41	21
42	20
43	19
44	18
45	17
46	16
47	15
48	14
49	13
50	12
51	11
52	10
53	9
54	8
55	7
56	6
57	5
58	4
59	3
60	2
61	1
62	0
63	251
64	250
65	249
66	248
67	247
68	246
69	245
70	244
71	243
72	242
73	241
74	240
75	239
76	238
77	237
78	236