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.

A321314 Number of permutations of [n] where the length of the longest increasing subsequence is larger than the length of the longest decreasing subsequence.

Table of values

n a(n)
1 0
2 1
3 1
4 10
5 42
6 232
7 1879
8 15228
9 131452
10 1329136
11 15106976
12 182954700
13 2363478435
14 33096395494
15 501248446126
16 8094778608472
17 138112754890488
18 2487454752219208
19 47344572399516136
20 950682668010605104
21 20055050996527350752
22 442701537970743308588
23 10202898078512473893032

List of values

[0, 1, 1, 10, 42, 232, 1879, 15228, 131452, 1329136, 15106976, 182954700, 2363478435, 33096395494, 501248446126, 8094778608472, 138112754890488, 2487454752219208, 47344572399516136, 950682668010605104, 20055050996527350752, 442701537970743308588, 10202898078512473893032]

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

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