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.

A274909 Largest prime factor of 9^n - 1.

Table of values

n a(n)
1 2
2 5
3 13
4 41
5 61
6 73
7 1093
8 193
9 757
10 1181
11 3851
12 6481
13 797161
14 16493
15 4561
16 21523361
17 34511
18 530713
19 363889
20 42521761
21 368089
22 570461
23 23535794707
24 6481
25 22996651
26 4795973261
27 19927
28 647753
29 20381027
30 47763361
31 22434744889
32 926510094425921
33 2413941289

List of values

[2, 5, 13, 41, 61, 73, 1093, 193, 757, 1181, 3851, 6481, 797161, 16493, 4561, 21523361, 34511, 530713, 363889, 42521761, 368089, 570461, 23535794707, 6481, 22996651, 4795973261, 19927, 647753, 20381027, 47763361, 22434744889, 926510094425921, 2413941289]