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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.

A263903 Number of length n arrays of permutations of 0..n-1 with each element moved by -6 to 6 places and the total absolute value of displacements not greater than 2*(n-1).

Table of values

n a(n)
1 1
2 2
3 6
4 20
5 76
6 300
7 1252
8 5197
9 21735
10 91151
11 384641
12 1629124
13 6927800
14 29539650
15 126281489
16 540980783
17 2321907944
18 9982050981
19 42977082052
20 185279158666
21 799716576405
22 3455546697332
23 14946086528673
24 64704061451845

List of values

[1, 2, 6, 20, 76, 300, 1252, 5197, 21735, 91151, 384641, 1629124, 6927800, 29539650, 126281489, 540980783, 2321907944, 9982050981, 42977082052, 185279158666, 799716576405, 3455546697332, 14946086528673, 64704061451845]

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

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