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.

A263699 Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and every three consecutive elements having its maximum within 4 of its minimum.

Table of values

n a(n)
1 1
2 2
3 6
4 24
5 120
6 168
7 204
8 348
9 696
10 1601
11 3476
12 7244
13 14048
14 27164
15 54300
16 109741
17 223641
18 452621
19 908389
20 1822758
21 3657710
22 7359642
23 14825163
24 29845108
25 60064056
26 120806672
27 242986234
28 488854773
29 983578792
30 1979138437
31 3982088115

List of values

[1, 2, 6, 24, 120, 168, 204, 348, 696, 1601, 3476, 7244, 14048, 27164, 54300, 109741, 223641, 452621, 908389, 1822758, 3657710, 7359642, 14825163, 29845108, 60064056, 120806672, 242986234, 488854773, 983578792, 1979138437, 3982088115]

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

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