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.

A109840 Largest prime factor of the reverse concatenation of the first n consecutive odd numbers.

Table of values

n a(n)
1 31
2 59
3 443
4 13933
5 2609
6 83089
7 18937669
8 57697
9 71615663503
10 161768817795401
11 4356390089
12 4668342004597
13 109230695824219
14 2770122504473483
15 217596035578054625221
16 1721572826917
17 659160492491

List of values

[31, 59, 443, 13933, 2609, 83089, 18937669, 57697, 71615663503, 161768817795401, 4356390089, 4668342004597, 109230695824219, 2770122504473483, 217596035578054625221, 1721572826917, 659160492491]

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

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