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.

A077835 Expansion of 1/(1 - 2*x - 2*x^2 - 2*x^3).

Table of values

n a(n)
0 1
1 2
2 6
3 18
4 52
5 152
6 444
7 1296
8 3784
9 11048
10 32256
11 94176
12 274960
13 802784
14 2343840
15 6843168
16 19979584
17 58333184
18 170311872
19 497249280
20 1451788672
21 4238699648
22 12375475200
23 36131927040
24 105492203776
25 307999212032
26 899246685696
27 2625476203008
28 7665444201472

List of values

[1, 2, 6, 18, 52, 152, 444, 1296, 3784, 11048, 32256, 94176, 274960, 802784, 2343840, 6843168, 19979584, 58333184, 170311872, 497249280, 1451788672, 4238699648, 12375475200, 36131927040, 105492203776, 307999212032, 899246685696, 2625476203008, 7665444201472]