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.

A263681 Number of length n arrays of permutations of 0..n-1 with each element moved by -6 to 6 places and with no two consecutive decreases.

Table of values

n a(n)
1 1
2 2
3 5
4 17
5 70
6 349
7 2017
8 11253
9 58743
10 286327
11 1331630
12 6077344
13 27523597
14 126333667
15 587717372
16 2760990038
17 13033515692
18 61583867944
19 290639649211
20 1368090247852
21 6426462715392
22 30151737816899
23 141417395713905

List of values

[1, 2, 5, 17, 70, 349, 2017, 11253, 58743, 286327, 1331630, 6077344, 27523597, 126333667, 587717372, 2760990038, 13033515692, 61583867944, 290639649211, 1368090247852, 6426462715392, 30151737816899, 141417395713905]

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

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