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.

A047890 Number of permutations in S_n with longest increasing subsequence of length <= 5.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 719
7 5003
8 39429
9 344837
10 3291590
11 33835114
12 370531683
13 4285711539
14 51990339068
15 657723056000
16 8636422912277
17 117241501095189
18 1639974912709122
19 23570308719710838
20 347217077020664880
21 5231433025400049936
22 80466744544235325387

List of values

[1, 1, 2, 6, 24, 120, 719, 5003, 39429, 344837, 3291590, 33835114, 370531683, 4285711539, 51990339068, 657723056000, 8636422912277, 117241501095189, 1639974912709122, 23570308719710838, 347217077020664880, 5231433025400049936, 80466744544235325387]

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

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