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.

A384712 Expansion of (1+2*x) / (1-2*x-6*x^2).

Table of values

n a(n)
0 1
1 4
2 14
3 52
4 188
5 688
6 2504
7 9136
8 33296
9 121408
10 442592
11 1613632
12 5882816
13 21447424
14 78191744
15 285068032
16 1039286528
17 3788981248
18 13813681664
19 50361250816
20 183604591616
21 669376688128
22 2440380925952
23 8897021980672
24 32436329517056
25 118254790918144

List of values

[1, 4, 14, 52, 188, 688, 2504, 9136, 33296, 121408, 442592, 1613632, 5882816, 21447424, 78191744, 285068032, 1039286528, 3788981248, 13813681664, 50361250816, 183604591616, 669376688128, 2440380925952, 8897021980672, 32436329517056, 118254790918144]