A033921 - cp's OEIS frontend

A033921 Largest proper substring of 2^n that is a power of 2 (0 if none).

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	2
6	4
7	8
8	2
9	2
10	4
11	8
12	4
13	8
14	16
15	32
16	0
17	2
18	4
19	8
20	8
21	2
22	4
23	8
24	16
25	32
26	64
27	8
28	8
29	8
30	8
31	64
32	4
33	8
34	8
35	8
36	8
37	8
38	8
39	8
40	16
41	32
42	8
43	8
44	16
45	32
46	64
47	32
48	8
49	4
50	8
51	8
52	4
53	4
54	8
55	8
56	4
57	8
58	8
59	64
60	8
61	8
62	16
63	8
64	16
65	32
66	64
67	64
68	8
69	8
70	16
71	32
72	64
73	32
74	8
75	16
76	32
77	64
78	4
79	8
80	8
81	16
82	32
83	64
84	16
85	32
86	64
87	8
88	8

[0, 0, 0, 0, 1, 2, 4, 8, 2, 2, 4, 8, 4, 8, 16, 32, 0, 2, 4, 8, 8, 2, 4, 8, 16, 32, 64, 8, 8, 8, 8, 64, 4, 8, 8, 8, 8, 8, 8, 8, 16, 32, 8, 8, 16, 32, 64, 32, 8, 4, 8, 8, 4, 4, 8, 8, 4, 8, 8, 64, 8, 8, 16, 8, 16, 32, 64, 64, 8, 8, 16, 32, 64, 32, 8, 16, 32, 64, 4, 8, 8, 16, 32, 64, 16, 32, 64, 8, 8]

cp's OEIS Frontend

A033921 Largest proper substring of 2^n that is a power of 2 (0 if none).

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	2
6	4
7	8
8	2
9	2
10	4
11	8
12	4
13	8
14	16
15	32
16	0
17	2
18	4
19	8
20	8
21	2
22	4
23	8
24	16
25	32
26	64
27	8
28	8
29	8
30	8
31	64
32	4
33	8
34	8
35	8
36	8
37	8
38	8
39	8
40	16
41	32
42	8
43	8
44	16
45	32
46	64
47	32
48	8
49	4
50	8
51	8
52	4
53	4
54	8
55	8
56	4
57	8
58	8
59	64
60	8
61	8
62	16
63	8
64	16
65	32
66	64
67	64
68	8
69	8
70	16
71	32
72	64
73	32
74	8
75	16
76	32
77	64
78	4
79	8
80	8
81	16
82	32
83	64
84	16
85	32
86	64
87	8
88	8

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	2
6	4
7	8
8	2
9	2
10	4
11	8
12	4
13	8
14	16
15	32
16	0
17	2
18	4
19	8
20	8
21	2
22	4
23	8
24	16
25	32
26	64
27	8
28	8
29	8
30	8
31	64
32	4
33	8
34	8
35	8
36	8
37	8
38	8
39	8
40	16
41	32
42	8
43	8
44	16
45	32
46	64
47	32
48	8
49	4
50	8
51	8
52	4
53	4
54	8
55	8
56	4
57	8
58	8
59	64
60	8
61	8
62	16
63	8
64	16
65	32
66	64
67	64
68	8
69	8
70	16
71	32
72	64
73	32
74	8
75	16
76	32
77	64
78	4
79	8
80	8
81	16
82	32
83	64
84	16
85	32
86	64
87	8
88	8

n	a(n)
0	0
1	0
2	0
3	0
4	1
5	2
6	4
7	8
8	2
9	2
10	4
11	8
12	4
13	8
14	16
15	32
16	0
17	2
18	4
19	8
20	8
21	2
22	4
23	8
24	16
25	32
26	64
27	8
28	8
29	8
30	8
31	64
32	4
33	8
34	8
35	8
36	8
37	8
38	8
39	8
40	16
41	32
42	8
43	8
44	16
45	32
46	64
47	32
48	8
49	4
50	8
51	8
52	4
53	4
54	8
55	8
56	4
57	8
58	8
59	64
60	8
61	8
62	16
63	8
64	16
65	32
66	64
67	64
68	8
69	8
70	16
71	32
72	64
73	32
74	8
75	16
76	32
77	64
78	4
79	8
80	8
81	16
82	32
83	64
84	16
85	32
86	64
87	8
88	8