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# User:Alec Jones

I'm a writer in the automotive industry. I am mostly interested in combinatorial sequences with nice geometric interpretations.

**Education**

University of Portland B.A. Mathematics, Philosophy, French Studies 2013 University of Arizona Graduate Study in Pure Mathematics 2014 (no degree) Gonzaga University Master of Teaching (Secondary Mathematics) 2015 Washington State University PhD Mathematics and Science Education (ongoing)

*Italics* represent sequences (to which) my former students have contributed.

**Bold** represents my personal favorites.

## Contents

## Sudoku-Like Grids

Construction: Move through an infinite plane tiling in a certain order, filling it with numbers according to some property (e.g. no repeated values in any row, column, or diagonal).

**"Greedy" Sequences**

A269526A334049 A335490

**"Seen-From" Sequences**

A300154A334742A279965 A279966 A279967 A279968 A334741

## Counting Geometric Figures

Construction: How many objects are there of size *n* that satisfy a given property?

A272053A278299

## Self-Referential Sequences

Construction: How many prior terms in the sequence match a given property?

A269347A269423 A269427 A269524 A269525 A270536 A270654 A270841 A273185 A273190 A284548 A333400

## Number-Theoretic Sequences

Construction: What numbers satisfy a given property?

A274034

## Derivatives of Other Sequences

Construction: For instance, for what values of *n* does A269347(*n*) have a given property?

A271326 A271328 A271566 A273191 A276127 A278436 A333398 A333401

I have contributed to the following sequences: A068911, A137734, A189978, A237420, A275815, **A000127** (new formula!), A279212, A279211, A279212