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.

A177686 If a1a2a3 is a 3-digit integer in a concatenated form, we define two permutations of its digits as follows: P1(a1a2a3)=a2a3a1 and P2(a1a2a3)=a1a3a2, then we take the absolute value of their difference. Thus we form a sequence: a1a2a3, abs(P1(a1a2a3)-P2(a1a2a3)), and so on.

Table of values

n a(n)
1 99
2 891
3 198
4 792
5 297
6 693
7 396
8 594
9 495

List of values

[99, 891, 198, 792, 297, 693, 396, 594, 495]

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

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