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.

A370323 Number of derangements of [n] having no adjacent 2-cycles, no adjacent 3-cycles and no adjacent 4-cycles.

Table of values

n a(n)
0 1
1 0
2 0
3 1
4 6
5 35
6 217
7 1568
8 12848
9 117738
10 1194019
11 13282346
12 160856190
13 2107154067
14 29691159876
15 447836111629
16 7199765822643
17 122909558878512
18 2220556571338744
19 42329227454294820
20 849072524072460101
21 17877662074795269964
22 394248958294191005180

List of values

[1, 0, 0, 1, 6, 35, 217, 1568, 12848, 117738, 1194019, 13282346, 160856190, 2107154067, 29691159876, 447836111629, 7199765822643, 122909558878512, 2220556571338744, 42329227454294820, 849072524072460101, 17877662074795269964, 394248958294191005180]

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

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