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.

A383990 Series expansion of the exponential generating function exp(-dend(-x))-1 where dend(x) = (1 - sqrt(1+4*x)) / (2*x) + 1 (given by A000108).

Table of values

n a(n)
0 0
1 1
2 -3
3 19
4 -191
5 2661
6 -47579
7 1040047
8 -26888511
9 802727209
10 -27178685459
11 1029077910411
12 -43086906080063
13 1976633329627789
14 -98597207392040811
15 5313105048925173991
16 -307587436319162110079
17 19038773384213189214417
18 -1254686724727364725716131

List of values

[0, 1, -3, 19, -191, 2661, -47579, 1040047, -26888511, 802727209, -27178685459, 1029077910411, -43086906080063, 1976633329627789, -98597207392040811, 5313105048925173991, -307587436319162110079, 19038773384213189214417, -1254686724727364725716131]