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.

A169731 Numbers that are the same upside down (using only digits 0, 1, 6 and 9).

Table of values

n a(n)
1 0
2 1
3 11
4 69
5 96
6 101
7 111
8 609
9 619
10 906
11 916
12 1001
13 1111
14 1691
15 1961
16 6009
17 6119
18 6699
19 6969
20 9006
21 9116
22 9696
23 9966
24 10001
25 10101
26 11011
27 11111
28 16091
29 16191
30 19061
31 19161
32 60009
33 60109
34 61019
35 61119
36 66099
37 66199
38 69069
39 69169
40 90006
41 90106
42 91016
43 91116

List of values

[0, 1, 11, 69, 96, 101, 111, 609, 619, 906, 916, 1001, 1111, 1691, 1961, 6009, 6119, 6699, 6969, 9006, 9116, 9696, 9966, 10001, 10101, 11011, 11111, 16091, 16191, 19061, 19161, 60009, 60109, 61019, 61119, 66099, 66199, 69069, 69169, 90006, 90106, 91016, 91116]

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

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