A019567 - cp's OEIS frontend

A019567 Order of the Mongean shuffle permutation of 2n cards: a(n) is least number m for which either 2^m + 1 or 2^m - 1 is divisible by 4n + 1.

n	a(n)
0	1
1	2
2	3
3	6
4	4
5	6
6	10
7	14
8	5
9	18
10	10
11	12
12	21
13	26
14	9
15	30
16	6
17	22
18	9
19	30
20	27
21	8
22	11
23	10
24	24
25	50
26	12
27	18
28	14
29	12
30	55
31	50
32	7
33	18
34	34
35	46
36	14
37	74
38	24
39	26
40	33
41	20
42	78
43	86
44	29
45	90
46	18
47	18
48	48
49	98
50	33
51	10
52	45
53	70
54	15
55	24
56	60
57	38
58	29
59	78
60	12
61	84
62	41
63	110
64	8
65	84
66	26
67	134
68	12
69	46
70	35
71	36
72	68
73	146

[1, 2, 3, 6, 4, 6, 10, 14, 5, 18, 10, 12, 21, 26, 9, 30, 6, 22, 9, 30, 27, 8, 11, 10, 24, 50, 12, 18, 14, 12, 55, 50, 7, 18, 34, 46, 14, 74, 24, 26, 33, 20, 78, 86, 29, 90, 18, 18, 48, 98, 33, 10, 45, 70, 15, 24, 60, 38, 29, 78, 12, 84, 41, 110, 8, 84, 26, 134, 12, 46, 35, 36, 68, 146]

cp's OEIS Frontend

A019567 Order of the Mongean shuffle permutation of 2n cards: a(n) is least number m for which either 2^m + 1 or 2^m - 1 is divisible by 4n + 1.

Table of values

List of values

n	a(n)
0	1
1	2
2	3
3	6
4	4
5	6
6	10
7	14
8	5
9	18
10	10
11	12
12	21
13	26
14	9
15	30
16	6
17	22
18	9
19	30
20	27
21	8
22	11
23	10
24	24
25	50
26	12
27	18
28	14
29	12
30	55
31	50
32	7
33	18
34	34
35	46
36	14
37	74
38	24
39	26
40	33
41	20
42	78
43	86
44	29
45	90
46	18
47	18
48	48
49	98
50	33
51	10
52	45
53	70
54	15
55	24
56	60
57	38
58	29
59	78
60	12
61	84
62	41
63	110
64	8
65	84
66	26
67	134
68	12
69	46
70	35
71	36
72	68
73	146

n	a(n)
0	1
1	2
2	3
3	6
4	4
5	6
6	10
7	14
8	5
9	18
10	10
11	12
12	21
13	26
14	9
15	30
16	6
17	22
18	9
19	30
20	27
21	8
22	11
23	10
24	24
25	50
26	12
27	18
28	14
29	12
30	55
31	50
32	7
33	18
34	34
35	46
36	14
37	74
38	24
39	26
40	33
41	20
42	78
43	86
44	29
45	90
46	18
47	18
48	48
49	98
50	33
51	10
52	45
53	70
54	15
55	24
56	60
57	38
58	29
59	78
60	12
61	84
62	41
63	110
64	8
65	84
66	26
67	134
68	12
69	46
70	35
71	36
72	68
73	146

n	a(n)
0	1
1	2
2	3
3	6
4	4
5	6
6	10
7	14
8	5
9	18
10	10
11	12
12	21
13	26
14	9
15	30
16	6
17	22
18	9
19	30
20	27
21	8
22	11
23	10
24	24
25	50
26	12
27	18
28	14
29	12
30	55
31	50
32	7
33	18
34	34
35	46
36	14
37	74
38	24
39	26
40	33
41	20
42	78
43	86
44	29
45	90
46	18
47	18
48	48
49	98
50	33
51	10
52	45
53	70
54	15
55	24
56	60
57	38
58	29
59	78
60	12
61	84
62	41
63	110
64	8
65	84
66	26
67	134
68	12
69	46
70	35
71	36
72	68
73	146