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.

A264367 Number of (3+1)X(n+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,0 0,2 1,0 or -1,-2.

Table of values

n a(n)
1 1
2 13
3 169
4 936
5 5184
6 33408
7 215296
8 1323792
9 8139609
10 50261301
11 310358689
12 1916465345
13 11834176225
14 73043905820
15 450847788304
16 2783165854192
17 17180991840016
18 106056375378580
19 654674355426025
20 4041262228505645

List of values

[1, 13, 169, 936, 5184, 33408, 215296, 1323792, 8139609, 50261301, 310358689, 1916465345, 11834176225, 73043905820, 450847788304, 2783165854192, 17180991840016, 106056375378580, 654674355426025, 4041262228505645]

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

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