A265514 - cp's OEIS frontend

A265514 a(n) = largest base-4 palindrome m <= n such that every base-4 digit of m is <= the corresponding digit of n; m is written in base 4.

n	a(n)
0	0
1	1
2	2
3	3
4	0
5	11
6	11
7	11
8	0
9	11
10	22
11	22
12	0
13	11
14	22
15	33
16	0
17	101
18	101
19	101
20	0
21	111
22	111
23	111
24	0
25	121
26	121
27	121
28	0
29	131
30	131
31	131
32	0
33	101
34	202
35	202
36	0
37	111
38	212
39	212
40	0
41	121
42	222
43	222
44	0
45	131
46	232
47	232
48	0
49	101
50	202
51	303
52	0
53	111
54	212
55	313
56	0
57	121
58	222
59	323
60	0
61	131
62	232
63	333
64	0
65	1001
66	1001
67	1001
68	0
69	1001
70	1001
71	1001
72	0

[0, 1, 2, 3, 0, 11, 11, 11, 0, 11, 22, 22, 0, 11, 22, 33, 0, 101, 101, 101, 0, 111, 111, 111, 0, 121, 121, 121, 0, 131, 131, 131, 0, 101, 202, 202, 0, 111, 212, 212, 0, 121, 222, 222, 0, 131, 232, 232, 0, 101, 202, 303, 0, 111, 212, 313, 0, 121, 222, 323, 0, 131, 232, 333, 0, 1001, 1001, 1001, 0, 1001, 1001, 1001, 0]

cp's OEIS Frontend

A265514 a(n) = largest base-4 palindrome m <= n such that every base-4 digit of m is <= the corresponding digit of n; m is written in base 4.

Table of values

List of values