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.

A296519 Denominator of n*Sum_{k=1..n} 1/(n+k).

Table of values

n a(n)
1 2
2 6
3 20
4 210
5 504
6 4620
7 51480
8 18018
9 272272
10 23279256
11 21162960
12 446185740
13 2059318800
14 5736673800
15 22181805360
16 1289317436550
17 1213475234400
18 8022419605200
19 281206918792800
20 267146572853160
21 10431437606647200
22 428163098127382800
23 409547311252279200

List of values

[2, 6, 20, 210, 504, 4620, 51480, 18018, 272272, 23279256, 21162960, 446185740, 2059318800, 5736673800, 22181805360, 1289317436550, 1213475234400, 8022419605200, 281206918792800, 267146572853160, 10431437606647200, 428163098127382800, 409547311252279200]

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

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