Number Triangles
- Aitken's Array
- Bell Triangle
- Bernoulli Triangle
- Catalan's Triangle
- Clark's Triangle
- Decad
- Euler's Number Triangle
- Eulerian Number
- Kimberling Sequence
- Leibniz Harmonic Triangle
- Losanitsch's Triangle
- Magog Triangle
- Monotone Triangle
- Narayana Triangle
- Number Pattern
- Number Pyramid
- Pascal Matrix
- Pascal's Triangle
- Peirce Triangle
- Pfaffian
- Prime Triangle
- Rascal Triangle
- Second-Order Eulerian Triangle
- Seidel-Entringer-Arnold Triangle
- Sierpiński Sieve
- Tetractys
- Tetraktys
- Trinomial Triangle
- Wythoff Array