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.

A263596 Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 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 3360
9 14024
10 55492
11 223040
12 900728
13 3560916
14 14099980
15 56141676
16 222623336
17 881949584
18 3502057736
19 13900013276
20 55132695636
21 218842222824
22 868762179984
23 3447429959044
24 13682419728976
25 54311665765692

List of values

[1, 2, 6, 16, 52, 208, 800, 3360, 14024, 55492, 223040, 900728, 3560916, 14099980, 56141676, 222623336, 881949584, 3502057736, 13900013276, 55132695636, 218842222824, 868762179984, 3447429959044, 13682419728976, 54311665765692]

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

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