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.

A135914 a(n) = 4*3^n - 2*2^n - 1.

Table of values

n a(n)
0 1
1 7
2 27
3 91
4 291
5 907
6 2787
7 8491
8 25731
9 77707
10 234147
11 704491
12 2117571
13 6360907
14 19099107
15 57330091
16 172055811
17 516298507
18 1549157667
19 4647997291
20 13945040451
21 41837218507
22 125515849827
23 376555938091
24 1129684591491
25 3389087328907
26 10167329095587

List of values

[1, 7, 27, 91, 291, 907, 2787, 8491, 25731, 77707, 234147, 704491, 2117571, 6360907, 19099107, 57330091, 172055811, 516298507, 1549157667, 4647997291, 13945040451, 41837218507, 125515849827, 376555938091, 1129684591491, 3389087328907, 10167329095587]