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.

A264546 Number of (n+1) X (4+1) arrays of permutations of 0..n*5+4 with each element having directed index change -1,1 -1,2 1,0 or 0,-1.

Table of values

n a(n)
1 1
2 16
3 36
4 216
5 1160
6 4640
7 23140
8 110592
9 501828
10 2390752
11 11231244
12 52348752
13 246436064
14 1155790856
15 5415128884
16 25420656744
17 119225756880
18 559133362408
19 2623138509120
20 12303725497848
21 57710528607716
22 270708963027848

List of values

[1, 16, 36, 216, 1160, 4640, 23140, 110592, 501828, 2390752, 11231244, 52348752, 246436064, 1155790856, 5415128884, 25420656744, 119225756880, 559133362408, 2623138509120, 12303725497848, 57710528607716, 270708963027848]

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

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