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.

A126644 a(n) = 3*3^n - 3*2^n + 1.

Table of values

n a(n)
1 4
2 16
3 58
4 196
5 634
6 1996
7 6178
8 18916
9 57514
10 174076
11 525298
12 1582036
13 4758394
14 14299756
15 42948418
16 128943556
17 387027274
18 1161475036
19 3485211538
20 10457207476
21 31374768154
22 94130595916
23 282404370658
24 847238277796

List of values

[4, 16, 58, 196, 634, 1996, 6178, 18916, 57514, 174076, 525298, 1582036, 4758394, 14299756, 42948418, 128943556, 387027274, 1161475036, 3485211538, 10457207476, 31374768154, 94130595916, 282404370658, 847238277796]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.