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.

A007019 a(n) = (2n+1)! / 2^n.

Table of values

n a(n)
0 1
1 3
2 30
3 630
4 22680
5 1247400
6 97297200
7 10216206000
8 1389404016000
9 237588086736000
10 49893498214560000
11 12623055048283680000
12 3786916514485104000000
13 1329207696584271504000000
14 539658324813214230624000000
15 250941121038144617240160000000
16 132496911908140357902804480000000

List of values

[1, 3, 30, 630, 22680, 1247400, 97297200, 10216206000, 1389404016000, 237588086736000, 49893498214560000, 12623055048283680000, 3786916514485104000000, 1329207696584271504000000, 539658324813214230624000000, 250941121038144617240160000000, 132496911908140357902804480000000]

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

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