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.

A007055 Let S denote the palindromes in the language {0,1}*; a(n) = number of words of length n in the language SS.

Table of values

n a(n)
0 1
1 2
2 4
3 8
4 16
5 32
6 52
7 100
8 160
9 260
10 424
11 684
12 1036
13 1640
14 2552
15 3728
16 5920
17 8672
18 13408
19 19420
20 30136
21 42736
22 66840
23 94164
24 145900
25 204632
26 317776
27 441764
28 685232
29 950216
30 1469632
31 2031556
32 3139360
33 4323888
34 6675904
35 9174400
36 14139496
37 19398584
38 29864888
39 40891040
40 62882680
41 85983152

List of values

[1, 2, 4, 8, 16, 32, 52, 100, 160, 260, 424, 684, 1036, 1640, 2552, 3728, 5920, 8672, 13408, 19420, 30136, 42736, 66840, 94164, 145900, 204632, 317776, 441764, 685232, 950216, 1469632, 2031556, 3139360, 4323888, 6675904, 9174400, 14139496, 19398584, 29864888, 40891040, 62882680, 85983152]

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

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