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.

A096121 Number of full spectrum rook's walks on a (2 X n) board.

Table of values

n a(n)
1 2
2 8
3 60
4 816
5 17520
6 550080
7 23839200
8 1365799680
9 100053999360
10 9127781913600
11 1015061950425600
12 135193044668774400
13 21248464632595200000
14 3891825697262043340800
15 821745573997874093568000
16 198152975926832672858112000
17 54121124248225908770856960000
18 16621698830590738881776812032000

List of values

[2, 8, 60, 816, 17520, 550080, 23839200, 1365799680, 100053999360, 9127781913600, 1015061950425600, 135193044668774400, 21248464632595200000, 3891825697262043340800, 821745573997874093568000, 198152975926832672858112000, 54121124248225908770856960000, 16621698830590738881776812032000]

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

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