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.

A230349 Number of permutations of [2n+9] in which the longest increasing run has length n+9.

Table of values

n a(n)
0 1
1 20
2 417
3 9690
4 253776
5 7465176
6 244906200
7 8891411760
8 354610872000
9 15432114297600
10 728406536457600
11 37090538241120000
12 2027740775284224000
13 118512161081233920000
14 7376476698319125196800
15 487273386402209523916800
16 34055074238462266429440000

List of values

[1, 20, 417, 9690, 253776, 7465176, 244906200, 8891411760, 354610872000, 15432114297600, 728406536457600, 37090538241120000, 2027740775284224000, 118512161081233920000, 7376476698319125196800, 487273386402209523916800, 34055074238462266429440000]

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

Content is available under The OEIS End-User License Agreement.