Video at YouTube about the Collatz conjecture (engl.)
Article at Wikipedia about the Collatz Conjecture (engl.)
Download link to the PDF with the approach
Download link to the short PDF with the approach
Links to execute the respective PHP scripts
Calculation of Collatz sequences
Revers of Collatz sequences (only odds)
"Map" of Collatz numbers
Calculation of 3n-1 sequences
Revers of 3n-1 sequences (only odds)
"Map of 3n-1 numbers