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.

A005477 a(n) = 2^(n-1)*(2^n - 1)*Product_{j=1..n-1} (2^j + 1).

Table of values

n a(n)
0 0
1 1
2 18
3 420
4 16200
5 1138320
6 152681760
7 40012315200
8 20727639504000
9 21349793828563200
10 43852643645542617600
11 179883715700853141120000
12 1474687052822610564537600000
13 24170122236238340825650936320000
14 792151597973733707815459821941760000
15 51919200227802645600849976559054284800000

List of values

[0, 1, 18, 420, 16200, 1138320, 152681760, 40012315200, 20727639504000, 21349793828563200, 43852643645542617600, 179883715700853141120000, 1474687052822610564537600000, 24170122236238340825650936320000, 792151597973733707815459821941760000, 51919200227802645600849976559054284800000]