Pell and Pell-Lucas numbers with applications

1. Fundamentals

2. Pell's equation

3. Continued fractions

4. Pythagorean triples

5. Triangular numbers

6. Square-triangular numbers

7. Pell and Pell-Lucas numbers

8. Additional Pell identities

9. Pascal's triangle and the Pell family

10. Pell sums and products

11. Generating functions for the Pell family

12. Pell walks

13. Pell triangles

14. Pell and Pell-Lucas polynomials

15. Pellonometry

16. Pell tilings

17. Pell-Fibonacci hybridities

18. An extended Pell family

19. Chebyshev Polynomials

20. Chebyshev tilings.