A023398 - cp's OEIS frontend

A023398 If any power of 2 ends with k 2's and 5's, they must be the first k terms of this sequence in reverse order.

n	a(n)
1	2
2	5
3	5
4	5
5	5
6	2
7	5
8	5
9	2
10	2
11	2
12	2
13	5
14	5
15	2
16	2
17	2
18	2
19	2
20	5
21	5
22	5
23	5
24	2
25	5
26	5
27	5
28	2
29	2
30	5
31	5
32	5
33	5
34	5
35	5
36	5
37	5
38	5
39	5
40	2
41	5
42	5
43	2
44	5
45	2
46	5
47	2
48	2
49	5
50	2
51	2
52	2
53	2
54	5
55	5
56	5
57	5
58	5
59	2
60	2
61	5
62	5
63	2
64	5
65	2
66	5
67	5
68	5
69	2
70	5
71	2
72	2
73	2
74	5
75	2
76	2
77	2
78	5
79	5
80	2
81	2
82	2
83	5
84	2
85	5
86	2
87	5
88	5
89	2
90	2
91	5
92	5
93	2
94	5
95	2
96	2
97	5
98	2
99	2
100	2
101	2
102	5
103	2
104	5
105	5
106	2
107	5
108	2

[2, 5, 5, 5, 5, 2, 5, 5, 2, 2, 2, 2, 5, 5, 2, 2, 2, 2, 2, 5, 5, 5, 5, 2, 5, 5, 5, 2, 2, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 5, 5, 2, 5, 2, 5, 2, 2, 5, 2, 2, 2, 2, 5, 5, 5, 5, 5, 2, 2, 5, 5, 2, 5, 2, 5, 5, 5, 2, 5, 2, 2, 2, 5, 2, 2, 2, 5, 5, 2, 2, 2, 5, 2, 5, 2, 5, 5, 2, 2, 5, 5, 2, 5, 2, 2, 5, 2, 2, 2, 2, 5, 2, 5, 5, 2, 5, 2]

cp's OEIS Frontend

A023398 If any power of 2 ends with k 2's and 5's, they must be the first k terms of this sequence in reverse order.

Table of values

List of values

n	a(n)
1	2
2	5
3	5
4	5
5	5
6	2
7	5
8	5
9	2
10	2
11	2
12	2
13	5
14	5
15	2
16	2
17	2
18	2
19	2
20	5
21	5
22	5
23	5
24	2
25	5
26	5
27	5
28	2
29	2
30	5
31	5
32	5
33	5
34	5
35	5
36	5
37	5
38	5
39	5
40	2
41	5
42	5
43	2
44	5
45	2
46	5
47	2
48	2
49	5
50	2
51	2
52	2
53	2
54	5
55	5
56	5
57	5
58	5
59	2
60	2
61	5
62	5
63	2
64	5
65	2
66	5
67	5
68	5
69	2
70	5
71	2
72	2
73	2
74	5
75	2
76	2
77	2
78	5
79	5
80	2
81	2
82	2
83	5
84	2
85	5
86	2
87	5
88	5
89	2
90	2
91	5
92	5
93	2
94	5
95	2
96	2
97	5
98	2
99	2
100	2
101	2
102	5
103	2
104	5
105	5
106	2
107	5
108	2

n	a(n)
1	2
2	5
3	5
4	5
5	5
6	2
7	5
8	5
9	2
10	2
11	2
12	2
13	5
14	5
15	2
16	2
17	2
18	2
19	2
20	5
21	5
22	5
23	5
24	2
25	5
26	5
27	5
28	2
29	2
30	5
31	5
32	5
33	5
34	5
35	5
36	5
37	5
38	5
39	5
40	2
41	5
42	5
43	2
44	5
45	2
46	5
47	2
48	2
49	5
50	2
51	2
52	2
53	2
54	5
55	5
56	5
57	5
58	5
59	2
60	2
61	5
62	5
63	2
64	5
65	2
66	5
67	5
68	5
69	2
70	5
71	2
72	2
73	2
74	5
75	2
76	2
77	2
78	5
79	5
80	2
81	2
82	2
83	5
84	2
85	5
86	2
87	5
88	5
89	2
90	2
91	5
92	5
93	2
94	5
95	2
96	2
97	5
98	2
99	2
100	2
101	2
102	5
103	2
104	5
105	5
106	2
107	5
108	2

n	a(n)
1	2
2	5
3	5
4	5
5	5
6	2
7	5
8	5
9	2
10	2
11	2
12	2
13	5
14	5
15	2
16	2
17	2
18	2
19	2
20	5
21	5
22	5
23	5
24	2
25	5
26	5
27	5
28	2
29	2
30	5
31	5
32	5
33	5
34	5
35	5
36	5
37	5
38	5
39	5
40	2
41	5
42	5
43	2
44	5
45	2
46	5
47	2
48	2
49	5
50	2
51	2
52	2
53	2
54	5
55	5
56	5
57	5
58	5
59	2
60	2
61	5
62	5
63	2
64	5
65	2
66	5
67	5
68	5
69	2
70	5
71	2
72	2
73	2
74	5
75	2
76	2
77	2
78	5
79	5
80	2
81	2
82	2
83	5
84	2
85	5
86	2
87	5
88	5
89	2
90	2
91	5
92	5
93	2
94	5
95	2
96	2
97	5
98	2
99	2
100	2
101	2
102	5
103	2
104	5
105	5
106	2
107	5
108	2