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.

A108704 Number of partitions of 112233...nn into n pairs.

Table of values

n a(n)
0 1
1 1
2 4
3 18
4 126
5 1110
6 12120
7 156660
8 2341500
9 39701340
10 752839920
11 15785181720
12 362606123880
13 9055825538760
14 244296192460320
15 7079382509799600
16 219321853964413200
17 7233629128601475600
18 253054306933115688000
19 9358989706213886138400
20 364860828050107348159200

List of values

[1, 1, 4, 18, 126, 1110, 12120, 156660, 2341500, 39701340, 752839920, 15785181720, 362606123880, 9055825538760, 244296192460320, 7079382509799600, 219321853964413200, 7233629128601475600, 253054306933115688000, 9358989706213886138400, 364860828050107348159200]