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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.

A264418 Number of (n+1)X(3+1) arrays of permutations of 0..n*4+3 with each element having directed index change 0,1 2,2 1,0 -1,2 -2,-1 or -1,-1.

Table of values

n a(n)
1 0
2 12
3 96
4 529
5 4843
6 44264
7 352713
8 2840274
9 23795758
10 197390196
11 1619132059
12 13345740560
13 110326933611
14 910298134238
15 7505842151352
16 61932503872184
17 511075503235669
18 4216464623838747
19 34786555887673881
20 287016646384919794

List of values

[0, 12, 96, 529, 4843, 44264, 352713, 2840274, 23795758, 197390196, 1619132059, 13345740560, 110326933611, 910298134238, 7505842151352, 61932503872184, 511075503235669, 4216464623838747, 34786555887673881, 287016646384919794]

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

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