A181281 - cp's OEIS frontend

A181281 A version of Josephus problem: a(n) is the surviving integer under the following elimination process. Arrange 1,2,3,...,n in a circle, increasing clockwise. Starting with i=1, delete the integer 4 places clockwise from i. Repeat, counting 4 places from the next undeleted integer, until only one integer remains.

n	a(n)
1	1
2	2
3	1
4	2
5	2
6	1
7	6
8	3
9	8
10	3
11	8
12	1
13	6
14	11
15	1
16	6
17	11
18	16
19	2
20	7
21	12
22	17
23	22
24	3
25	8
26	13
27	18
28	23
29	28
30	3
31	8
32	13
33	18
34	23
35	28
36	33
37	1
38	6
39	11
40	16
41	21
42	26
43	31
44	36
45	41
46	46
47	4
48	9
49	14
50	19
51	24
52	29
53	34
54	39
55	44
56	49
57	54
58	1
59	6
60	11
61	16
62	21
63	26
64	31
65	36
66	41
67	46
68	51
69	56
70	61
71	66
72	71
73	3
74	8
75	13
76	18
77	23
78	28
79	33
80	38

[1, 2, 1, 2, 2, 1, 6, 3, 8, 3, 8, 1, 6, 11, 1, 6, 11, 16, 2, 7, 12, 17, 22, 3, 8, 13, 18, 23, 28, 3, 8, 13, 18, 23, 28, 33, 1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 4, 9, 14, 19, 24, 29, 34, 39, 44, 49, 54, 1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 3, 8, 13, 18, 23, 28, 33, 38]

cp's OEIS Frontend

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	2
5	2
6	1
7	6
8	3
9	8
10	3
11	8
12	1
13	6
14	11
15	1
16	6
17	11
18	16
19	2
20	7
21	12
22	17
23	22
24	3
25	8
26	13
27	18
28	23
29	28
30	3
31	8
32	13
33	18
34	23
35	28
36	33
37	1
38	6
39	11
40	16
41	21
42	26
43	31
44	36
45	41
46	46
47	4
48	9
49	14
50	19
51	24
52	29
53	34
54	39
55	44
56	49
57	54
58	1
59	6
60	11
61	16
62	21
63	26
64	31
65	36
66	41
67	46
68	51
69	56
70	61
71	66
72	71
73	3
74	8
75	13
76	18
77	23
78	28
79	33
80	38

n	a(n)
1	1
2	2
3	1
4	2
5	2
6	1
7	6
8	3
9	8
10	3
11	8
12	1
13	6
14	11
15	1
16	6
17	11
18	16
19	2
20	7
21	12
22	17
23	22
24	3
25	8
26	13
27	18
28	23
29	28
30	3
31	8
32	13
33	18
34	23
35	28
36	33
37	1
38	6
39	11
40	16
41	21
42	26
43	31
44	36
45	41
46	46
47	4
48	9
49	14
50	19
51	24
52	29
53	34
54	39
55	44
56	49
57	54
58	1
59	6
60	11
61	16
62	21
63	26
64	31
65	36
66	41
67	46
68	51
69	56
70	61
71	66
72	71
73	3
74	8
75	13
76	18
77	23
78	28
79	33
80	38

n	a(n)
1	1
2	2
3	1
4	2
5	2
6	1
7	6
8	3
9	8
10	3
11	8
12	1
13	6
14	11
15	1
16	6
17	11
18	16
19	2
20	7
21	12
22	17
23	22
24	3
25	8
26	13
27	18
28	23
29	28
30	3
31	8
32	13
33	18
34	23
35	28
36	33
37	1
38	6
39	11
40	16
41	21
42	26
43	31
44	36
45	41
46	46
47	4
48	9
49	14
50	19
51	24
52	29
53	34
54	39
55	44
56	49
57	54
58	1
59	6
60	11
61	16
62	21
63	26
64	31
65	36
66	41
67	46
68	51
69	56
70	61
71	66
72	71
73	3
74	8
75	13
76	18
77	23
78	28
79	33
80	38