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.

A276289 Expansion of x*(1 + x)/(1 - 2*x)^3.

Table of values

n a(n)
0 0
1 1
2 7
3 30
4 104
5 320
6 912
7 2464
8 6400
9 16128
10 39680
11 95744
12 227328
13 532480
14 1232896
15 2826240
16 6422528
17 14483456
18 32440320
19 72220672
20 159907840
21 352321536
22 772800512
23 1688207360
24 3674210304
25 7969177600
26 17230200832
27 37144756224
28 79859548160
29 171261820928
30 366414397440

List of values

[0, 1, 7, 30, 104, 320, 912, 2464, 6400, 16128, 39680, 95744, 227328, 532480, 1232896, 2826240, 6422528, 14483456, 32440320, 72220672, 159907840, 352321536, 772800512, 1688207360, 3674210304, 7969177600, 17230200832, 37144756224, 79859548160, 171261820928, 366414397440]