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.

A007058 Let S denote the palindromes in the language {0,1,2,3,4}*; a(n) = number of words of length n in the language SS.

Table of values

n a(n)
0 1
1 5
2 25
3 65
4 265
5 605
6 2125
7 4345
8 14665
9 27965
10 93025
11 171825
12 559645
13 1015565
14 3276725
15 5857865
16 18734665
17 33203045
18 105436225
19 185546785
20 585842065
21 1025381485
22 3222484125
23 5615234265
24 17577530845
25 30517575605
26 95213827825
27 164794865465
28 512692025285
29 885009765485
30 2746575977125

List of values

[1, 5, 25, 65, 265, 605, 2125, 4345, 14665, 27965, 93025, 171825, 559645, 1015565, 3276725, 5857865, 18734665, 33203045, 105436225, 185546785, 585842065, 1025381485, 3222484125, 5615234265, 17577530845, 30517575605, 95213827825, 164794865465, 512692025285, 885009765485, 2746575977125]

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

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