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.

A072346 Volume of n-dimensional sphere of radius r is V_n*r^n = Pi^(n/2)*r^n/(n/2)! = C_n*Pi^floor(n/2)*r^n; sequence gives denominator of C_n.

Table of values

n a(n)
0 1
1 1
2 1
3 3
4 2
5 15
6 6
7 105
8 24
9 945
10 120
11 10395
12 720
13 135135
14 5040
15 2027025
16 40320
17 34459425
18 362880
19 654729075
20 3628800
21 13749310575
22 39916800
23 316234143225
24 479001600
25 7905853580625
26 6227020800
27 213458046676875
28 87178291200
29 6190283353629375
30 1307674368000

List of values

[1, 1, 1, 3, 2, 15, 6, 105, 24, 945, 120, 10395, 720, 135135, 5040, 2027025, 40320, 34459425, 362880, 654729075, 3628800, 13749310575, 39916800, 316234143225, 479001600, 7905853580625, 6227020800, 213458046676875, 87178291200, 6190283353629375, 1307674368000]