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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.

A264492 Number of (4+1) X (n+1) arrays of permutations of 0..n*5+4 with each element having directed index change 2,-1 1,0 2,1 0,-1 -2,-2 or -1,0.

Table of values

n a(n)
1 12
2 16
3 212
4 788
5 4772
6 23076
7 122628
8 626276
9 3250500
10 16761124
11 86652932
12 447525860
13 2312212676
14 11944531620
15 61707373956
16 318782647652
17 1646858513988
18 8507781990436
19 43951835558660
20 227058335082212
21 1172999888706500

List of values

[12, 16, 212, 788, 4772, 23076, 122628, 626276, 3250500, 16761124, 86652932, 447525860, 2312212676, 11944531620, 61707373956, 318782647652, 1646858513988, 8507781990436, 43951835558660, 227058335082212, 1172999888706500]

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

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