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.

A095249 Reverse concatenation of first n positive integers modulo forward concatenation of first n positive integers.

Table of values

n a(n)
1 0
2 9
3 75
4 619
5 4941
6 37041
7 246919
8 1234575
9 9
10 10987654321
11 1110987654321
12 121110987654321
13 775432077543108
14 178553219976533007
15 27956332009875522906
16 3805734210999774512805
17 481583522109989673502704
18 58259362312008979572492603
19 6836037241301907969471482502

List of values

[0, 9, 75, 619, 4941, 37041, 246919, 1234575, 9, 10987654321, 1110987654321, 121110987654321, 775432077543108, 178553219976533007, 27956332009875522906, 3805734210999774512805, 481583522109989673502704, 58259362312008979572492603, 6836037241301907969471482502]

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

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