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.

A189452 Number of 4Xn array permutations with each element moving zero or one space horizontally or diagonally.

Table of values

n a(n)
1 1
2 34
3 400
4 7300
5 118128
6 2008890
7 33735505
8 569476049
9 9601403672
10 161963813841
11 2731821630753
12 46079554836082
13 777248318344360
14 13110321921956724
15 221139603633268744
16 3730094981047721690
17 62917755232156271921

List of values

[1, 34, 400, 7300, 118128, 2008890, 33735505, 569476049, 9601403672, 161963813841, 2731821630753, 46079554836082, 777248318344360, 13110321921956724, 221139603633268744, 3730094981047721690, 62917755232156271921]

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

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