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.

A337043 a(0) = 1; thereafter a(n) = exp(-1/n) * Sum_{k>=0} (n*k - 1)^n / (n^k * k!).

Table of values

n a(n)
0 1
1 0
2 2
3 9
4 112
5 1875
6 43416
7 1310946
8 49778688
9 2313362673
10 128894500000
11 8469572721533
12 647341071298560
13 56871349337125648
14 5684260661585401728
15 640631299771142578125
16 80788871646072851660800
17 11323828537291632967145015
18 1753760620207362607774290432

List of values

[1, 0, 2, 9, 112, 1875, 43416, 1310946, 49778688, 2313362673, 128894500000, 8469572721533, 647341071298560, 56871349337125648, 5684260661585401728, 640631299771142578125, 80788871646072851660800, 11323828537291632967145015, 1753760620207362607774290432]