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.

A203161 (n-1)-st elementary symmetric function of the first n terms of (3,1,2,3,1,2,3,1,2,...).

Table of values

n a(n)
1 1
2 4
3 11
4 39
5 57
6 132
7 432
8 540
9 1188
10 3780
11 4428
12 9504
13 29808
14 33696
15 71280
16 221616
17 244944
18 513216
19 1586304
20 1726272
21 3592512
22 11057472
23 11897280
24 24634368
25 75582720
26 80621568
27 166281984
28 508923648
29 539156736
30 1108546560
31 3386105856

List of values

[1, 4, 11, 39, 57, 132, 432, 540, 1188, 3780, 4428, 9504, 29808, 33696, 71280, 221616, 244944, 513216, 1586304, 1726272, 3592512, 11057472, 11897280, 24634368, 75582720, 80621568, 166281984, 508923648, 539156736, 1108546560, 3386105856]

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

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