# Book:David Wells/Curious and Interesting Numbers

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## David Wells:

## David Wells: *The Penguin Dictionary of Curious and Interesting Numbers*

Published $\text {1986}$

### Contents

- Introduction
- A List of Mathematicians in Chronological Sequence
- Glossary
- Bibliography

- The Dictionary

- Tables
- The First $100$ Triangular Numbers, Squares and Cubes
- The First $20$ Pentagonal, Hexagonal, Heptagonal and Octagonal Numbers
- The First $40$ Fibonacci Numbers
- The Prime Numbers less than $1000$
- The Factorials of the Numbers $1$ to $20$
- The Decimal Reciprocals of the Primes from $7$ to $97$
- The Factors of the Repunits from $11$ to $R_{40}$
- The Factors, where Composite, and the Values of the Functions $\map \phi n$, $\map d n$ and $\map \sigma n$

- Index

### Click here for errata

## Further Editions