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.

A224403 Number of n X n 0..1 arrays with rows unimodal and antidiagonals nondecreasing.

Table of values

n a(n)
1 2
2 12
3 100
4 884
5 7812
6 68282
7 590254
8 5055858
9 42996954
10 363652198
11 3062704166
12 25711681080
13 215327121414
14 1799987423914
15 15026012170736
16 125307656075926
17 1044220994847456
18 8697261784264396
19 72413790737672880
20 602789200212580366

List of values

[2, 12, 100, 884, 7812, 68282, 590254, 5055858, 42996954, 363652198, 3062704166, 25711681080, 215327121414, 1799987423914, 15026012170736, 125307656075926, 1044220994847456, 8697261784264396, 72413790737672880, 602789200212580366]

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

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