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.

A165817 Number of compositions (= ordered integer partitions) of n into 2n parts.

Table of values

n a(n)
0 1
1 2
2 10
3 56
4 330
5 2002
6 12376
7 77520
8 490314
9 3124550
10 20030010
11 129024480
12 834451800
13 5414950296
14 35240152720
15 229911617056
16 1503232609098
17 9847379391150
18 64617565719070
19 424655979547800
20 2794563003870330
21 18412956934908690
22 121455445321173600

List of values

[1, 2, 10, 56, 330, 2002, 12376, 77520, 490314, 3124550, 20030010, 129024480, 834451800, 5414950296, 35240152720, 229911617056, 1503232609098, 9847379391150, 64617565719070, 424655979547800, 2794563003870330, 18412956934908690, 121455445321173600]

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

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