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.

A213090 Number of permutations of length n whose associated Schubert variety is defined by inclusions.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 23
5 101
6 477
7 2343
8 11762
9 59786
10 306132
11 1574536
12 8120782
13 41957030
14 217021682
15 1123371986
16 5817788471
17 30139492189
18 156174965473
19 809382185187
20 4195096032623
21 21745137658765
22 112720985668763
23 584336632836945
24 3029232133574325
25 15703985220888071

List of values

[1, 1, 2, 6, 23, 101, 477, 2343, 11762, 59786, 306132, 1574536, 8120782, 41957030, 217021682, 1123371986, 5817788471, 30139492189, 156174965473, 809382185187, 4195096032623, 21745137658765, 112720985668763, 584336632836945, 3029232133574325, 15703985220888071]

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

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