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.

A308036 Coefficient of x^n in 1/(n+1) * (1 + x - 3*x^2)^(n+1).

Table of values

n a(n)
0 1
1 1
2 -2
3 -8
4 1
5 61
6 91
7 -377
8 -1469
9 1027
10 16120
11 18250
12 -132065
13 -427517
14 620062
15 5707648
16 3746683
17 -55581941
18 -144227438
19 351490672
20 2274331579
21 278638399
22 -25348074713
23 -50842003745
24 195685236757
25 957135268261
26 -459626168864
27 -12027281377922

List of values

[1, 1, -2, -8, 1, 61, 91, -377, -1469, 1027, 16120, 18250, -132065, -427517, 620062, 5707648, 3746683, -55581941, -144227438, 351490672, 2274331579, 278638399, -25348074713, -50842003745, 195685236757, 957135268261, -459626168864, -12027281377922]