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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.

A264374 Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 2,-2 -1,0 -1,2 1,0 or 0,-1.

Table of values

n a(n)
1 4
2 6
3 80
4 441
5 3249
6 22484
7 156293
8 1097881
9 7657324
10 53631087
11 374971549
12 2623479579
13 18351250984
14 128373536659
15 898014323096
16 6281872878413
17 43943675806740
18 307399346962192
19 2150352679484064
20 15042375439676549

List of values

[4, 6, 80, 441, 3249, 22484, 156293, 1097881, 7657324, 53631087, 374971549, 2623479579, 18351250984, 128373536659, 898014323096, 6281872878413, 43943675806740, 307399346962192, 2150352679484064, 15042375439676549]

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

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