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.

A031440 a(0) = 3; for n > 0, a(n) is the greatest prime factor of a(n-1)^2 - 2.

Table of values

n a(n)
0 3
1 7
2 47
3 2207
4 4481
5 26111
6 189017
7 67271
8 11815633
9 606737
10 708641
11 354023
12 125332284527
13 51939720282500417
14 18062107820423
15 1376080289340623571113
16 4012316132900773615751
17 983669740542169
18 4443427285129103
19 19744046038229790810567377584607
20 4300749014896245437702886338812998834884967953
21 41572359968343362282287450730112204489086145685200294134959430572332688727999

List of values

[3, 7, 47, 2207, 4481, 26111, 189017, 67271, 11815633, 606737, 708641, 354023, 125332284527, 51939720282500417, 18062107820423, 1376080289340623571113, 4012316132900773615751, 983669740542169, 4443427285129103, 19744046038229790810567377584607, 4300749014896245437702886338812998834884967953, 41572359968343362282287450730112204489086145685200294134959430572332688727999]

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

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