A038712 - cp's OEIS frontend

A038712 Let k be the exponent of highest power of 2 dividing n (A007814); a(n) = 2^(k+1)-1.

n	a(n)
1	1
2	3
3	1
4	7
5	1
6	3
7	1
8	15
9	1
10	3
11	1
12	7
13	1
14	3
15	1
16	31
17	1
18	3
19	1
20	7
21	1
22	3
23	1
24	15
25	1
26	3
27	1
28	7
29	1
30	3
31	1
32	63
33	1
34	3
35	1
36	7
37	1
38	3
39	1
40	15
41	1
42	3
43	1
44	7
45	1
46	3
47	1
48	31
49	1
50	3
51	1
52	7
53	1
54	3
55	1
56	15
57	1
58	3
59	1
60	7
61	1
62	3
63	1
64	127
65	1
66	3
67	1
68	7
69	1
70	3
71	1
72	15
73	1
74	3
75	1
76	7
77	1
78	3
79	1
80	31
81	1
82	3
83	1
84	7
85	1
86	3
87	1
88	15
89	1
90	3
91	1
92	7
93	1
94	3
95	1
96	63
97	1
98	3

[1, 3, 1, 7, 1, 3, 1, 15, 1, 3, 1, 7, 1, 3, 1, 31, 1, 3, 1, 7, 1, 3, 1, 15, 1, 3, 1, 7, 1, 3, 1, 63, 1, 3, 1, 7, 1, 3, 1, 15, 1, 3, 1, 7, 1, 3, 1, 31, 1, 3, 1, 7, 1, 3, 1, 15, 1, 3, 1, 7, 1, 3, 1, 127, 1, 3, 1, 7, 1, 3, 1, 15, 1, 3, 1, 7, 1, 3, 1, 31, 1, 3, 1, 7, 1, 3, 1, 15, 1, 3, 1, 7, 1, 3, 1, 63, 1, 3]

cp's OEIS Frontend

A038712 Let k be the exponent of highest power of 2 dividing n (A007814); a(n) = 2^(k+1)-1.

Table of values

List of values

n	a(n)
1	1
2	3
3	1
4	7
5	1
6	3
7	1
8	15
9	1
10	3
11	1
12	7
13	1
14	3
15	1
16	31
17	1
18	3
19	1
20	7
21	1
22	3
23	1
24	15
25	1
26	3
27	1
28	7
29	1
30	3
31	1
32	63
33	1
34	3
35	1
36	7
37	1
38	3
39	1
40	15
41	1
42	3
43	1
44	7
45	1
46	3
47	1
48	31
49	1
50	3
51	1
52	7
53	1
54	3
55	1
56	15
57	1
58	3
59	1
60	7
61	1
62	3
63	1
64	127
65	1
66	3
67	1
68	7
69	1
70	3
71	1
72	15
73	1
74	3
75	1
76	7
77	1
78	3
79	1
80	31
81	1
82	3
83	1
84	7
85	1
86	3
87	1
88	15
89	1
90	3
91	1
92	7
93	1
94	3
95	1
96	63
97	1
98	3

n	a(n)
1	1
2	3
3	1
4	7
5	1
6	3
7	1
8	15
9	1
10	3
11	1
12	7
13	1
14	3
15	1
16	31
17	1
18	3
19	1
20	7
21	1
22	3
23	1
24	15
25	1
26	3
27	1
28	7
29	1
30	3
31	1
32	63
33	1
34	3
35	1
36	7
37	1
38	3
39	1
40	15
41	1
42	3
43	1
44	7
45	1
46	3
47	1
48	31
49	1
50	3
51	1
52	7
53	1
54	3
55	1
56	15
57	1
58	3
59	1
60	7
61	1
62	3
63	1
64	127
65	1
66	3
67	1
68	7
69	1
70	3
71	1
72	15
73	1
74	3
75	1
76	7
77	1
78	3
79	1
80	31
81	1
82	3
83	1
84	7
85	1
86	3
87	1
88	15
89	1
90	3
91	1
92	7
93	1
94	3
95	1
96	63
97	1
98	3

n	a(n)
1	1
2	3
3	1
4	7
5	1
6	3
7	1
8	15
9	1
10	3
11	1
12	7
13	1
14	3
15	1
16	31
17	1
18	3
19	1
20	7
21	1
22	3
23	1
24	15
25	1
26	3
27	1
28	7
29	1
30	3
31	1
32	63
33	1
34	3
35	1
36	7
37	1
38	3
39	1
40	15
41	1
42	3
43	1
44	7
45	1
46	3
47	1
48	31
49	1
50	3
51	1
52	7
53	1
54	3
55	1
56	15
57	1
58	3
59	1
60	7
61	1
62	3
63	1
64	127
65	1
66	3
67	1
68	7
69	1
70	3
71	1
72	15
73	1
74	3
75	1
76	7
77	1
78	3
79	1
80	31
81	1
82	3
83	1
84	7
85	1
86	3
87	1
88	15
89	1
90	3
91	1
92	7
93	1
94	3
95	1
96	63
97	1
98	3