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.

A263760 Number of length n arrays of permutations of 0..n-1 with each element moved by -4 to 4 places and exactly one more element moved upwards than downwards.

Table of values

n a(n)
1 0
2 0
3 1
4 4
5 31
6 106
7 485
8 1546
9 6083
10 21020
11 83505
12 298850
13 1157277
14 4174794
15 15848043
16 57833610
17 218278105
18 803890160
19 3022404618
20 11185043168
21 41937855185
22 155739217814
23 583290598528
24 2171877488824
25 8131306069328

List of values

[0, 0, 1, 4, 31, 106, 485, 1546, 6083, 21020, 83505, 298850, 1157277, 4174794, 15848043, 57833610, 218278105, 803890160, 3022404618, 11185043168, 41937855185, 155739217814, 583290598528, 2171877488824, 8131306069328]

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

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