A023400 - cp's OEIS frontend

A023400 If any power of 2 ends with k 2's and 9's, they must be the first k terms of this sequence in reverse order.

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

[2, 9, 9, 2, 9, 2, 2, 2, 2, 2, 2, 9, 9, 2, 9, 9, 9, 9, 2, 2, 9, 2, 9, 2, 9, 2, 2, 9, 2, 2, 9, 2, 2, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 9, 2, 2, 9, 9, 2, 9, 9, 9, 9, 9, 2, 9, 2, 9, 2, 2, 9, 9, 9, 2, 2, 9, 9, 9, 2, 9, 2, 2, 2, 2, 9, 9, 9, 9, 9, 9, 9, 9, 2, 9, 2, 9, 2, 2, 2, 9, 9, 2, 2, 2, 9, 9, 2, 9, 9, 2, 9, 9, 9, 2, 2, 9, 9]

cp's OEIS Frontend

A023400 If any power of 2 ends with k 2's and 9'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	9
3	9
4	2
5	9
6	2
7	2
8	2
9	2
10	2
11	2
12	9
13	9
14	2
15	9
16	9
17	9
18	9
19	2
20	2
21	9
22	2
23	9
24	2
25	9
26	2
27	2
28	9
29	2
30	2
31	9
32	2
33	2
34	9
35	9
36	9
37	9
38	9
39	2
40	2
41	2
42	2
43	2
44	2
45	9
46	2
47	2
48	9
49	9
50	2
51	9
52	9
53	9
54	9
55	9
56	2
57	9
58	2
59	9
60	2
61	2
62	9
63	9
64	9
65	2
66	2
67	9
68	9
69	9
70	2
71	9
72	2
73	2
74	2
75	2
76	9
77	9
78	9
79	9
80	9
81	9
82	9
83	9
84	2
85	9
86	2
87	9
88	2
89	2
90	2
91	9
92	9
93	2
94	2
95	2
96	9
97	9
98	2
99	9
100	9
101	2
102	9
103	9
104	9
105	2
106	2
107	9
108	9

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

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