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.

A108306 Expansion of (3*x+1)/(1-3*x-3*x^2).

Table of values

n a(n)
0 1
1 6
2 21
3 81
4 306
5 1161
6 4401
7 16686
8 63261
9 239841
10 909306
11 3447441
12 13070241
13 49553046
14 187869861
15 712268721
16 2700415746
17 10238053401
18 38815407441
19 147160382526
20 557927369901
21 2115263257281
22 8019571881546
23 30404505416481
24 115272231894081

List of values

[1, 6, 21, 81, 306, 1161, 4401, 16686, 63261, 239841, 909306, 3447441, 13070241, 49553046, 187869861, 712268721, 2700415746, 10238053401, 38815407441, 147160382526, 557927369901, 2115263257281, 8019571881546, 30404505416481, 115272231894081]