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.

A263701 Number of length n arrays of permutations of 0..n-1 with each element moved by -6 to 6 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
6 288
7 456
8 488
9 754
10 1699
11 3744
12 7940
13 15748
14 30396
15 60160
16 120944
17 246040
18 499256
19 1004336
20 2016168
21 4044432
22 8130660
23 16373500
24 32966620
25 66358420
26 133489108
27 268489288
28 540125980
29 1086691764
30 2186585680
31 4399583284

List of values

[1, 2, 6, 24, 120, 288, 456, 488, 754, 1699, 3744, 7940, 15748, 30396, 60160, 120944, 246040, 499256, 1004336, 2016168, 4044432, 8130660, 16373500, 32966620, 66358420, 133489108, 268489288, 540125980, 1086691764, 2186585680, 4399583284]

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

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