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.

A290443 a(n) = Catalan(n)*Motzkin(n-1).

Table of values

n a(n)
1 1
2 2
3 10
4 56
5 378
6 2772
7 21879
8 181610
9 1570426
10 14024660
11 128623768
12 1206053576
13 11523121900
14 111885197400
15 1101664016730
16 10981102287240
17 110647549986930
18 1125688857747300
19 11551507304378580
20 119462291733779280
21 1244159075360113380
22 13040616137944154760
23 137485676447508793950

List of values

[1, 2, 10, 56, 378, 2772, 21879, 181610, 1570426, 14024660, 128623768, 1206053576, 11523121900, 111885197400, 1101664016730, 10981102287240, 110647549986930, 1125688857747300, 11551507304378580, 119462291733779280, 1244159075360113380, 13040616137944154760, 137485676447508793950]

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

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