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.

A203243 Second elementary symmetric function of the first n terms of (1,3,9,27,81,...).

Table of values

n a(n)
2 3
3 39
4 390
5 3630
6 33033
7 298389
8 2688780
9 24208860
10 217909263
11 1961271939
12 17651713170
13 158866215690
14 1429798332693
15 12868192168689
16 115813751041560
17 1042323823944120
18 9380914609207323
19 84428232063996639
20 759854090319361950

List of values

[3, 39, 390, 3630, 33033, 298389, 2688780, 24208860, 217909263, 1961271939, 17651713170, 158866215690, 1429798332693, 12868192168689, 115813751041560, 1042323823944120, 9380914609207323, 84428232063996639, 759854090319361950]

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

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