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.

A100215 Expansion of (4 - 7*x + 2*x^2)/((1-2*x)*(1 - 2*x + 2*x^2)).

Table of values

n a(n)
0 4
1 9
2 14
3 18
4 24
5 44
6 104
7 248
8 544
9 1104
10 2144
11 4128
12 8064
13 16064
14 32384
15 65408
16 131584
17 263424
18 525824
19 1049088
20 2095104
21 4189184
22 8382464
23 16775168
24 33562624
25 67129344
26 134242304
27 268443648
28 536838144

List of values

[4, 9, 14, 18, 24, 44, 104, 248, 544, 1104, 2144, 4128, 8064, 16064, 32384, 65408, 131584, 263424, 525824, 1049088, 2095104, 4189184, 8382464, 16775168, 33562624, 67129344, 134242304, 268443648, 536838144]