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.

A263783 Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and exactly two more elements moved upwards than downwards.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 5
6 37
7 116
8 572
9 2042
10 9298
11 35064
12 149613
13 562785
14 2272083
15 8551255
16 33698121
17 127422730
18 495208463
19 1874278884
20 7209869659
21 27281399998
22 104270642849
23 394494583551
24 1501695837844
25 5679621795233
26 21560364546542

List of values

[0, 0, 0, 1, 5, 37, 116, 572, 2042, 9298, 35064, 149613, 562785, 2272083, 8551255, 33698121, 127422730, 495208463, 1874278884, 7209869659, 27281399998, 104270642849, 394494583551, 1501695837844, 5679621795233, 21560364546542]

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

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