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.

A274975 Sum of n-th powers of the three roots of x^3-2*x^2-x+1.

Table of values

n a(n)
0 3
1 2
2 6
3 11
4 26
5 57
6 129
7 289
8 650
9 1460
10 3281
11 7372
12 16565
13 37221
14 83635
15 187926
16 422266
17 948823
18 2131986
19 4790529
20 10764221
21 24186985
22 54347662
23 122118088
24 274396853
25 616564132
26 1385407029
27 3112981337
28 6994805571
29 15717185450
30 35316195134
31 79354770147
32 178308549978

List of values

[3, 2, 6, 11, 26, 57, 129, 289, 650, 1460, 3281, 7372, 16565, 37221, 83635, 187926, 422266, 948823, 2131986, 4790529, 10764221, 24186985, 54347662, 122118088, 274396853, 616564132, 1385407029, 3112981337, 6994805571, 15717185450, 35316195134, 79354770147, 178308549978]

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

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