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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.

A090583 Gosper's approximation to n!, sqrt((2*n+1/3)*Pi)*n^n/e^n, rounded to nearest integer.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 24
5 120
6 720
7 5039
8 40316
9 362851
10 3628561
11 39914615
12 478979481
13 6226774954
14 87175314872
15 1307635379670
16 20922240412500
17 355679137660826
18 6402240370021199
19 121642823201649058
20 2432860847996122437
21 51090157192742729183
22 1123984974735953018069

List of values

[1, 1, 2, 6, 24, 120, 720, 5039, 40316, 362851, 3628561, 39914615, 478979481, 6226774954, 87175314872, 1307635379670, 20922240412500, 355679137660826, 6402240370021199, 121642823201649058, 2432860847996122437, 51090157192742729183, 1123984974735953018069]

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

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