\part{Combinatorial numbers}


Many integer sequences often arise from problems in combinatorics. This chapter studies such sequences and some elementary properties. These integer sequences can often be studied under number theory, bringing light to further properties.

\chapter{Catalan numbers}
- Catalan numbers
- Dyck words
- Segner's recurrence relation
\chapter{Eulerian numbers}
\chapter{Fibonacci numbers}
- Fibonacci numbers
- rabbbit problem
- Binet's formula
- limit of consecutive quotients
\chapter{Eulerian numbers}
\chapter{Stirling numbers}
