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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.

A264485 Number of (n+1)X(2+1) arrays of permutations of 0..n*3+2 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 1
2 1
3 12
4 16
5 214
6 324
7 2960
8 6442
9 42656
10 113575
11 636361
12 1918550
13 9612512
14 31689325
15 147107038
16 515046002
17 2273096344
18 8287463026
19 35352586169
20 132498950637
21 552353463562
22 2109344649645
23 8657596384451
24 33484770583688

List of values

[1, 1, 12, 16, 214, 324, 2960, 6442, 42656, 113575, 636361, 1918550, 9612512, 31689325, 147107038, 515046002, 2273096344, 8287463026, 35352586169, 132498950637, 552353463562, 2109344649645, 8657596384451, 33484770583688]

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

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