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.

A263680 Number of length n arrays of permutations of 0..n-1 with each element moved by -5 to 5 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 1658
8 7356
9 30374
10 121676
11 479589
12 1917853
13 7777174
14 31840851
15 130793340
16 537219555
17 2200344721
18 8992050521
19 36701192008
20 149773458903
21 611384304706
22 2496957012448
23 10201222295479
24 41681902590078

List of values

[1, 2, 5, 17, 70, 349, 1658, 7356, 30374, 121676, 479589, 1917853, 7777174, 31840851, 130793340, 537219555, 2200344721, 8992050521, 36701192008, 149773458903, 611384304706, 2496957012448, 10201222295479, 41681902590078]

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

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