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.

A264522 Number of (4+1)X(n+1) arrays of permutations of 0..n*5+4 with each element having directed index change -1,0 0,2 -1,-2 or 1,0.

Table of values

n a(n)
1 0
2 0
3 36
4 228
5 1444
6 8018
7 44521
8 258264
9 1498176
10 8784648
11 51509329
12 298721094
13 1732390884
14 10048882704
15 58289410624
16 338365016544
17 1964179826064
18 11397166993164
19 66132140115889
20 383699043436626
21 2226223976362884

List of values

[0, 0, 36, 228, 1444, 8018, 44521, 258264, 1498176, 8784648, 51509329, 298721094, 1732390884, 10048882704, 58289410624, 338365016544, 1964179826064, 11397166993164, 66132140115889, 383699043436626, 2226223976362884]

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

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