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.

A263595 Number of length n arrays of permutations of 0..n-1 with each element moved by -6 to 6 places and the median of every three consecutive elements nondecreasing.

Table of values

n a(n)
1 1
2 2
3 6
4 16
5 52
6 208
7 800
8 2900
9 10960
10 40792
11 148288
12 544600
13 2000084
14 7312332
15 26795812
16 98234356
17 359845004
18 1319030780
19 4834945864
20 17718152672
21 64944710636
22 238041386504
23 872396576888
24 3197533964256
25 11719620057508

List of values

[1, 2, 6, 16, 52, 208, 800, 2900, 10960, 40792, 148288, 544600, 2000084, 7312332, 26795812, 98234356, 359845004, 1319030780, 4834945864, 17718152672, 64944710636, 238041386504, 872396576888, 3197533964256, 11719620057508]

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

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