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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.

A056524 Palindromes with even number of digits.

Table of values

n a(n)
1 11
2 22
3 33
4 44
5 55
6 66
7 77
8 88
9 99
10 1001
11 1111
12 1221
13 1331
14 1441
15 1551
16 1661
17 1771
18 1881
19 1991
20 2002
21 2112
22 2222
23 2332
24 2442
25 2552
26 2662
27 2772
28 2882
29 2992
30 3003
31 3113
32 3223
33 3333
34 3443
35 3553
36 3663
37 3773
38 3883
39 3993
40 4004
41 4114
42 4224
43 4334
44 4444
45 4554

List of values

[11, 22, 33, 44, 55, 66, 77, 88, 99, 1001, 1111, 1221, 1331, 1441, 1551, 1661, 1771, 1881, 1991, 2002, 2112, 2222, 2332, 2442, 2552, 2662, 2772, 2882, 2992, 3003, 3113, 3223, 3333, 3443, 3553, 3663, 3773, 3883, 3993, 4004, 4114, 4224, 4334, 4444, 4554]

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

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