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.

A327692 Number of length-n phone numbers that can be dialed by a chess knight on a 0-9 keypad that starts on any number and takes n-1 steps.

Table of values

n a(n)
1 10
2 20
3 46
4 104
5 240
6 544
7 1256
8 2848
9 6576
10 14912
11 34432
12 78080
13 180288
14 408832
15 944000
16 2140672
17 4942848
18 11208704
19 25881088
20 58689536
21 135515136
22 307302400
23 709566464
24 1609056256
25 3715338240
26 8425127936
27 19453763584

List of values

[10, 20, 46, 104, 240, 544, 1256, 2848, 6576, 14912, 34432, 78080, 180288, 408832, 944000, 2140672, 4942848, 11208704, 25881088, 58689536, 135515136, 307302400, 709566464, 1609056256, 3715338240, 8425127936, 19453763584]

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

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