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.

A263696 Number of length n arrays of permutations of 0..n-1 with each element moved by -n to n places and every three consecutive elements having its maximum within 4 of its minimum.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 288
7 456
8 768
9 1508
10 3434
11 7560
12 16024
13 31872
14 61704
15 122464
16 246296
17 500506
18 1015010
19 2041372
20 4098824
21 8224718
22 16535378
23 33298104
24 67036986
25 134932118
26 271438490
27 545959366
28 1098340012
29 2209778140

List of values

[1, 1, 2, 6, 24, 120, 288, 456, 768, 1508, 3434, 7560, 16024, 31872, 61704, 122464, 246296, 500506, 1015010, 2041372, 4098824, 8224718, 16535378, 33298104, 67036986, 134932118, 271438490, 545959366, 1098340012, 2209778140]

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

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