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.

A217903 O.g.f.: Sum_{n>=0} 4*n^n*(n+4)^(n-1) * exp(-n*(n+4)*x) * x^n / n!.

Table of values

n a(n)
0 1
1 4
2 28
3 356
4 6696
5 165148
6 5030124
7 182425664
8 7681137152
9 368519318396
10 19855601635860
11 1187545259985444
12 78096484084586904
13 5602487847925307152
14 435490669526307321808
15 36468662242145922271968
16 3273635846285796437437824
17 313622489632532976209812284

List of values

[1, 4, 28, 356, 6696, 165148, 5030124, 182425664, 7681137152, 368519318396, 19855601635860, 1187545259985444, 78096484084586904, 5602487847925307152, 435490669526307321808, 36468662242145922271968, 3273635846285796437437824, 313622489632532976209812284]