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.

A131453 2 up, 2 down, ..., 2 up, 2 down permutations of length 4n+1.

Table of values

n a(n)
0 1
1 6
2 1456
3 2020656
4 9336345856
5 108480272749056
6 2664103110372192256
7 122840808510269863827456
8 9758611490955498257378246656
9 1251231616578606273788469919481856
10 245996119743058288132230759497577005056
11 71155698830255977656506481145458378597728256

List of values

[1, 6, 1456, 2020656, 9336345856, 108480272749056, 2664103110372192256, 122840808510269863827456, 9758611490955498257378246656, 1251231616578606273788469919481856, 245996119743058288132230759497577005056, 71155698830255977656506481145458378597728256]

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

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