Scribbles

Project Euler #27: Quadratic primes
Project Euler #26: Reciprocal cycles
Project Euler #25: 1000-digit Fibonacci number
Project Euler #24: Lexicographic permutations
Project Euler #23: Non-abundant sums
Project Euler #22: Names scores
Project Euler #21: Amicable numbers
Project Euler #20: Factorial digit sum
Project Euler #19: Counting Sundays
Project Euler #18: Maximum path sum I
Project Euler #17: Number letter counts
Project Euler #16: Power digit sum
Project Euler #15: Lattice paths
Project Euler #14: Longest Collatz sequence
Project Euler #13: Large sum
Project Euler #12: Highly divisible triangular number
Project Euler #11: Largest product in a grid
Project Euler #10: Summation of primes