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.

A264565 Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change 1,0 1,1 0,-1 or -1,1.

Table of values

n a(n)
1 2
2 8
3 44
4 192
5 888
6 4104
7 18540
8 85752
9 389340
10 1787832
11 8158644
12 37336464
13 170669592
14 780379920
15 3568245048
16 16314092712
17 74594729628
18 341056001520
19 1559406670200
20 7129910871000
21 32599645712604
22 149052729608136

List of values

[2, 8, 44, 192, 888, 4104, 18540, 85752, 389340, 1787832, 8158644, 37336464, 170669592, 780379920, 3568245048, 16314092712, 74594729628, 341056001520, 1559406670200, 7129910871000, 32599645712604, 149052729608136]

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

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