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.

A263702 Number of length n arrays of permutations of 0..n-1 with each element moved by -7 to 7 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
8 768
9 1002
10 1759
11 3766
12 7984
13 15880
14 30712
15 60880
16 122308
17 248493
18 504104
19 1014076
20 2036337
21 4085860
22 8213550
23 16539563
24 33298322
25 67024922
26 134834240
27 271198708
28 545583481
29 1097665701
30 2208646386
31 4443964256

List of values

[1, 2, 6, 24, 120, 288, 456, 768, 1002, 1759, 3766, 7984, 15880, 30712, 60880, 122308, 248493, 504104, 1014076, 2036337, 4085860, 8213550, 16539563, 33298322, 67024922, 134834240, 271198708, 545583481, 1097665701, 2208646386, 4443964256]

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

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