A102421 - cp's OEIS frontend

A102421 To get a(n), start with 2n+1, multiply by 3 and add 1 and divide out any power of 2; then multiply by 3 and subtract 1 and divide out any power of 2.

n	a(n)
0	1
1	7
2	1
3	1
4	5
5	25
6	7
7	17
8	19
9	43
10	1
11	13
12	7
13	61
14	1
15	35
16	37
17	79
18	5
19	11
20	23
21	97
22	25
23	53
24	55
25	115
26	7
27	31
28	1
29	133
30	17
31	71
32	73
33	151
34	19
35	5
36	41
37	169
38	43
39	89
40	91
41	187
42	1
43	49
44	25
45	205
46	13
47	107
48	109
49	223
50	7
51	29
52	59
53	241
54	61
55	125
56	127
57	259
58	1
59	67
60	17
61	277
62	35
63	143
64	145
65	295
66	37
67	19
68	77
69	313

[1, 7, 1, 1, 5, 25, 7, 17, 19, 43, 1, 13, 7, 61, 1, 35, 37, 79, 5, 11, 23, 97, 25, 53, 55, 115, 7, 31, 1, 133, 17, 71, 73, 151, 19, 5, 41, 169, 43, 89, 91, 187, 1, 49, 25, 205, 13, 107, 109, 223, 7, 29, 59, 241, 61, 125, 127, 259, 1, 67, 17, 277, 35, 143, 145, 295, 37, 19, 77, 313]

cp's OEIS Frontend

A102421 To get a(n), start with 2n+1, multiply by 3 and add 1 and divide out any power of 2; then multiply by 3 and subtract 1 and divide out any power of 2.

Table of values

List of values

n	a(n)
0	1
1	7
2	1
3	1
4	5
5	25
6	7
7	17
8	19
9	43
10	1
11	13
12	7
13	61
14	1
15	35
16	37
17	79
18	5
19	11
20	23
21	97
22	25
23	53
24	55
25	115
26	7
27	31
28	1
29	133
30	17
31	71
32	73
33	151
34	19
35	5
36	41
37	169
38	43
39	89
40	91
41	187
42	1
43	49
44	25
45	205
46	13
47	107
48	109
49	223
50	7
51	29
52	59
53	241
54	61
55	125
56	127
57	259
58	1
59	67
60	17
61	277
62	35
63	143
64	145
65	295
66	37
67	19
68	77
69	313

n	a(n)
0	1
1	7
2	1
3	1
4	5
5	25
6	7
7	17
8	19
9	43
10	1
11	13
12	7
13	61
14	1
15	35
16	37
17	79
18	5
19	11
20	23
21	97
22	25
23	53
24	55
25	115
26	7
27	31
28	1
29	133
30	17
31	71
32	73
33	151
34	19
35	5
36	41
37	169
38	43
39	89
40	91
41	187
42	1
43	49
44	25
45	205
46	13
47	107
48	109
49	223
50	7
51	29
52	59
53	241
54	61
55	125
56	127
57	259
58	1
59	67
60	17
61	277
62	35
63	143
64	145
65	295
66	37
67	19
68	77
69	313

n	a(n)
0	1
1	7
2	1
3	1
4	5
5	25
6	7
7	17
8	19
9	43
10	1
11	13
12	7
13	61
14	1
15	35
16	37
17	79
18	5
19	11
20	23
21	97
22	25
23	53
24	55
25	115
26	7
27	31
28	1
29	133
30	17
31	71
32	73
33	151
34	19
35	5
36	41
37	169
38	43
39	89
40	91
41	187
42	1
43	49
44	25
45	205
46	13
47	107
48	109
49	223
50	7
51	29
52	59
53	241
54	61
55	125
56	127
57	259
58	1
59	67
60	17
61	277
62	35
63	143
64	145
65	295
66	37
67	19
68	77
69	313