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.

A382709 Numerator of (2^n - 1)*n! / 2^(n+1).

Table of values

n a(n)
0 0
1 1
2 3
3 21
4 45
5 465
6 2835
7 40005
8 80325
9 1448685
10 14501025
11 319178475
12 1915538625
13 49810085325
14 697383762075
15 20922151375125
16 41844941263125
17 1422738857665125
18 25609397130442125
19 973158947113728375
20 9731598751921921875
21 408727342477198119375
22 8992003678359610033125
23 413632218513350843881875

List of values

[0, 1, 3, 21, 45, 465, 2835, 40005, 80325, 1448685, 14501025, 319178475, 1915538625, 49810085325, 697383762075, 20922151375125, 41844941263125, 1422738857665125, 25609397130442125, 973158947113728375, 9731598751921921875, 408727342477198119375, 8992003678359610033125, 413632218513350843881875]