cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A031161 Palindromic lucky numbers.

Table of values

n a(n)
1 1
2 3
3 7
4 9
5 33
6 99
7 111
8 141
9 151
10 171
11 303
12 393
13 535
14 717
15 727
16 777
17 787
18 979
19 1441
20 1771
21 3003
22 3223
23 3663
24 5335
25 7447
26 9009
27 9339
28 9999
29 10501
30 11011
31 11811
32 11911
33 12121
34 12321
35 12621
36 13531
37 13831
38 14041
39 14541
40 14841
41 17671
42 18181

List of values

[1, 3, 7, 9, 33, 99, 111, 141, 151, 171, 303, 393, 535, 717, 727, 777, 787, 979, 1441, 1771, 3003, 3223, 3663, 5335, 7447, 9009, 9339, 9999, 10501, 11011, 11811, 11911, 12121, 12321, 12621, 13531, 13831, 14041, 14541, 14841, 17671, 18181]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.