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.

A317279 a(n) = Sum_{k=0..n} (-1)^(n-k)*binomial(n-1,k-1)*n^k*n!/k!.

Table of values

n a(n)
0 1
1 1
2 0
3 -9
4 -32
5 225
6 3456
7 2695
8 -433152
9 -4495743
10 47872000
11 1768142871
12 6703534080
13 -597265448351
14 -11959736205312
15 126058380654375
16 9454322092343296
17 84694164336894465
18 -5776865438988238848
19 -192541299662555831753
20 1511905067561779200000
21 243338391925401706938081
22 3972949090873574466519040

List of values

[1, 1, 0, -9, -32, 225, 3456, 2695, -433152, -4495743, 47872000, 1768142871, 6703534080, -597265448351, -11959736205312, 126058380654375, 9454322092343296, 84694164336894465, -5776865438988238848, -192541299662555831753, 1511905067561779200000, 243338391925401706938081, 3972949090873574466519040]