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.

A343831 a(n) = denominator of (1/e) * Sum_{a_1>=1, a_2>=1, ... , a_n>=1} a_1 * a_2 * ... * a_n / (a_1 + a_2 + ... + a_n)!.

Table of values

n a(n)
1 1
2 3
3 120
4 2520
5 51840
6 2494800
7 6227020800
8 653837184000
9 27360571392000
10 30411275102208000
11 51090942171709440000
12 1846572624206069760000
13 15511210043330985984000000
14 1361108681302294020096000000
15 8841761993739701954543616000000

List of values

[1, 3, 120, 2520, 51840, 2494800, 6227020800, 653837184000, 27360571392000, 30411275102208000, 51090942171709440000, 1846572624206069760000, 15511210043330985984000000, 1361108681302294020096000000, 8841761993739701954543616000000]