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.

A337041 a(n) = exp(-1/5) * Sum_{k>=0} (5*k - 1)^n / (5^k * k!).

Table of values

n a(n)
0 1
1 0
2 5
3 25
4 200
5 1875
6 20625
7 256250
8 3534375
9 53515625
10 881468750
11 15667578125
12 298478828125
13 6060493750000
14 130542772265625
15 2971013486328125
16 71193375156250000
17 1790666151318359375
18 47145509926611328125
19 1296156682961425781250
20 37129279010879638671875

List of values

[1, 0, 5, 25, 200, 1875, 20625, 256250, 3534375, 53515625, 881468750, 15667578125, 298478828125, 6060493750000, 130542772265625, 2971013486328125, 71193375156250000, 1790666151318359375, 47145509926611328125, 1296156682961425781250, 37129279010879638671875]